Beam management procedures

ABSTRACT

Wireless communications are described. A wireless device and/or a base station may determine/select one or more beams for transmission of signals (e.g., sounding reference signals, SRSs) in one or more cells. The wireless device and/or the base station may determine/select a beam based on one or more of: cell indicators of a first cell and/or a second cell, antenna panel indicators associated with SRS transmissions, prorities of SRS transmissions, resource set indicators corresponding to the SRS transmissions, and/or other information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit U.S. Provisional Application No.62/790,317, titled “Prioritization in Downlink Beam Management” andfiled on Jan. 9, 2019, and U.S. Provisional Application No. 62/790,753,titled “Prioritization in Uplink Beam Management” and filed on Jan. 10,2019. The above-referenced applications are hereby incorporated byreference in their entireties.

BACKGROUND

Various procedures may be used for selecting wireless communicationresources. A wireless device and/or a base station may select one ormore beams among the multiple beams for transmission and/or reception ofsignals. Signaling protocols may not be able to indicate/provideinformation for the wireless device to select beams, which may result inthe wireless device being unable to determine a beam to be used fortransmission and/or reception of signals.

SUMMARY

The following summary presents a simplified summary of certain features.The summary is not an extensive overview and is not intended to identifykey or critical elements.

Wireless communications using one or more serving beams are described. Awireless device may determine/select one or more beams for transmissionof signals (e.g., sounding reference signals, SRSs) to one or morecells. The wireless device may select a beam (e.g., based on variousconsiderations), among a plurality of beams used for transmission of asignal in a first cell, for transmission of another signal in a secondcell. The base station may be aligned to use a beam that may be based ona selection rule applied at the wireless device. Beam selectiontechniques described herein may result in advantages such as improveddecoding/reception performance of SRS transmission, uplink channelestimation, uplink scheduling, and/or downlink scheduling.

These and other features and advantages are described in greater detailbelow.

BRIEF DESCRIPTION OF THE DRAWINGS

Some features are shown by way of example, and not by limitation, in theaccompanying drawings. In the drawings, like numerals reference similarelements.

FIG. 1 shows an example radio access network (RAN) architecture.

FIG. 2A shows an example user plane protocol stack.

FIG. 2B shows an example control plane protocol stack.

FIG. 3 shows an example wireless device and two base stations.

FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D show examples of uplink anddownlink signal transmission.

FIG. 5A shows an example uplink channel mapping and example uplinkphysical signals.

FIG. 5B shows an example downlink channel mapping and example downlinkphysical signals.

FIG. 6 shows an example transmission time and/or reception time for acarrier.

FIG. 7A and FIG. 7B show example sets of orthogonal frequency divisionmultiplexing (OFDM) subcarriers.

FIG. 8 shows example OFDM radio resources.

FIG. 9A shows an example channel state information reference signal(CSI-RS) and/or synchronization signal (SS) block transmission in amulti-beam system.

FIG. 9B shows an example downlink beam management procedure.

FIG. 10 shows an example of configured bandwidth parts (BWPs).

FIG. 11A and FIG. 11B show examples of multi connectivity.

FIG. 12 shows an example of a random access procedure.

FIG. 13 shows example medium access control (MAC) entities.

FIG. 14 shows an example RAN architecture.

FIG. 15 shows example radio resource control (RRC) states.

FIG. 16A, FIG. 16B and FIG. 16C show examples of sounding referencesignal (SRS) transmissions.

FIG. 17 shows an example SRS beam selection procedure based on cellindicators.

FIG. 18 shows an example SRS beam selection procedure based on SRSpriorities.

FIG. 19 shows an example SRS beam selection procedure based on SRSpriorities and cell indicators.

FIG. 20 shows an example SRS beam selection procedure based on SRSpriorities and SRS set indicators.

FIG. 21 shows an example SRS beam selection procedure based on SRSpriorities, cell indicators, and SRS set indicators.

FIG. 22 shows an example method for selecting/prioritizing a beam for anSRS transmission.

FIG. 23 shows an example method for selecting/prioritizing a beam for anSRS transmission.

FIG. 24 shows an example method for selecting/prioritizing a beam for anSRS transmission.

FIG. 25 shows an example method for selecting/prioritizing a beam for anSRS transmission.

FIG. 26 shows an example method for selecting/prioritizing a beam for anSRS transmission.

FIG. 27 shows example elements of a computing device that may be used toimplement any of the various devices described herein.

DETAILED DESCRIPTION

The accompanying drawings and descriptions provide examples. It is to beunderstood that the examples shown in the drawings and/or described arenon-exclusive and that there are other examples of how features shownand described may be practiced.

Examples are provided for operation of wireless communication systemswhich may be used in the technical field of multicarrier communicationsystems. More particularly, the technology described herein may relateto beam management procedures in multicarrier communication systems.

The following acronyms are used throughout the drawings and/ordescriptions, and are provided below for convenience although otheracronyms may be introduced in the detailed description:

3GPP 3rd Generation Partnership Project

5GC 5G Core Network

ACK Acknowledgement

AMF Access and Mobility Management Function

ARQ Automatic Repeat Request

AS Access Stratum

ASIC Application-Specific Integrated Circuit

BA Bandwidth Adaptation

BCCH Broadcast Control Channel

BCH Broadcast Channel

BFR Beam Failure Recovery

BLER Block Error Rate

BPSK Binary Phase Shift Keying

BSR Buffer Status Report

BWP Bandwidth Part

CA Carrier Aggregation

CC Component Carrier

CCCH Common Control CHannel

CDMA Code Division Multiple Access

CN Core Network

CORESET Control Resource Set

CP Cyclic Prefix

CP-OFDM Cyclic Prefix-Orthogonal Frequency Division Multiplex

C-RNTI Cell-Radio Network Temporary Identifier

CS Configured Scheduling

CSI Channel State Information

CSI-RS Channel State Information-Reference Signal

CQI Channel Quality Indicator

CSS Common Search Space

CU Central Unit

DC Dual Connectivity

DCCH Dedicated Control Channel

DCI Downlink Control Information

DL Downlink

DL-SCH Downlink Shared CHannel

DM-RS DeModulation Reference Signal

DRB Data Radio Bearer

DRX Discontinuous Reception

DTCH Dedicated Traffic Channel

DU Distributed Unit

EPC Evolved Packet Core

E-UTRA Evolved UMTS Terrestrial Radio Access

E-UTRAN Evolved-Universal Terrestrial Radio Access Network

FDD Frequency Division Duplex

FPGA Field Programmable Gate Arrays

F1-C F1-Control plane

F1-U F1-User plane

gNB next generation Node B

HARQ Hybrid Automatic Repeat reQuest

HDL Hardware Description Languages

IE Information Element

IP Internet Protocol

LCH Logical Channel

LCID Logical Channel Identifier

LTE Long Term Evolution

MAC Medium Access Control

MCG Master Cell Group

MCS Modulation and Coding Scheme

MeNB Master evolved Node B

MIB Master Information Block

MME Mobility Management Entity

MN Master Node

NACK Negative Acknowledgement

NAS Non-Access Stratum

NG CP Next Generation Control Plane

NGC Next Generation Core

NG-C NG-Control plane

ng-eNB next generation evolved Node B

NG-U NG-User plane

NR New Radio

NR MAC New Radio MAC

NR PDCP New Radio PDCP

NR PHY New Radio PHYsical

NR RLC New Radio RLC

NR RRC New Radio RRC

NSSAI Network Slice Selection Assistance Information

O&M Operation and Maintenance

OFDM Orthogonal Frequency Division Multiplexing

PBCH Physical Broadcast CHannel

PCC Primary Component Carrier

PCCH Paging Control CHannel

PCell Primary Cell

PCH Paging CHannel

PDCCH Physical Downlink Control CHannel

PDCP Packet Data Convergence Protocol

PDSCH Physical Downlink Shared CHannel

PDU Protocol Data Unit

PHICH Physical HARQ Indicator CHannel

PHY PHYsical

PLMN Public Land Mobile Network

PMI Precoding Matrix Indicator

PRACH Physical Random Access CHannel

PRB Physical Resource Block

PSCell Primary Secondary Cell

PSS Primary Synchronization Signal

pTAG primary Timing Advance Group

PT-RS Phase Tracking Reference Signal

PUCCH Physical Uplink Control CHannel

PUSCH Physical Uplink Shared CHannel

QAM Quadrature Amplitude Modulation

QCLed Quasi-Co-Located

QCL Quasi-Co-Location

QFI Quality of Service Indicator

QoS Quality of Service

QPSK Quadrature Phase Shift Keying

RA Random Access

RACH Random Access CHannel

RAN Radio Access Network

RAT Radio Access Technology

RA-RNTI Random Access-Radio Network Temporary Identifier

RB Resource Blocks

RBG Resource Block Groups

RI Rank indicator

RLC Radio Link Control

RLM Radio Link Monitoring

RRC Radio Resource Control

RS Reference Signal

RSRP Reference Signal Received Power

SCC Secondary Component Carrier

SCell Secondary Cell

SCG Secondary Cell Group

SC-FDMA Single Carrier-Frequency Division Multiple Access

SDAP Service Data Adaptation Protocol

SDU Service Data Unit

SeNB Secondary evolved Node B

SFN System Frame Number

S-GW Serving GateWay

SI System Information

SIB System Information Block

SINR Signal-to-Interference-plus-Noise Ratio

SMF Session Management Function

SN Secondary Node

SpCell Special Cell

SR Scheduling Request

SRB Signaling Radio Bearer

SRS Sounding Reference Signal

SS Synchronization Signal

SSB Synchronization Signal Block

SSS Secondary Synchronization Signal

sTAG secondary Timing Advance Group

TA Timing Advance

TAG Timing Advance Group

TAI Tracking Area Identifier

TAT Time Alignment Timer

TB Transport Block

TC-RNTI Temporary Cell-Radio Network Temporary Identifier

TCI Transmission Configuration Indication

TDD Time Division Duplex

TDMA Time Division Multiple Access

TRP Transmission and Receiving Point

TTI Transmission Time Interval

UCI Uplink Control Information

UE User Equipment

UL Uplink

UL-SCH Uplink Shared CHannel

UPF User Plane Function

UPGW User Plane Gateway

VHDL VHSIC Hardware Description Language

Xn-C Xn-Control plane

Xn-U Xn-User plane

Examples described herein may be implemented using various physicallayer modulation and transmission mechanisms. Example transmissionmechanisms may include, but are not limited to: Code Division MultipleAccess (CDMA), Orthogonal Frequency Division Multiple Access (OFDMA),Time Division Multiple Access (TDMA), Wavelet technologies, and/or thelike. Hybrid transmission mechanisms such as TDMA/CDMA, and/or OFDM/CDMAmay be used. Various modulation schemes may be used for signaltransmission in the physical layer. Examples of modulation schemesinclude, but are not limited to: phase, amplitude, code, a combinationof these, and/or the like. An example radio transmission method mayimplement Quadrature Amplitude Modulation (QAM) using Binary Phase ShiftKeying (BPSK), Quadrature Phase Shift Keying (QPSK), 16-QAM, 64-QAM,256-QAM, 1024-QAM and/or the like. Physical radio transmission may beenhanced by dynamically or semi-dynamically changing the modulation andcoding scheme, for example, depending on transmission requirementsand/or radio conditions.

FIG. 1 shows an example Radio Access Network (RAN) architecture. A RANnode may comprise a next generation Node B (gNB) (e.g., 120A, 120B)providing New Radio (NR) user plane and control plane protocolterminations towards a first wireless device (e.g., 110A). A RAN nodemay comprise a base station such as a next generation evolved Node B(ng-eNB) (e.g., 120C, 120D), providing Evolved UMTS Terrestrial RadioAccess (E-UTRA) user plane and control plane protocol terminationstowards a second wireless device (e.g., 110B). A first wireless device110A may communicate with a base station, such as a gNB 120A, over a Uuinterface. A second wireless device 110B may communicate with a basestation, such as an ng-eNB 120D, over a Uu interface. The wirelessdevices 110A and/or 110B may be structurally similar to wireless devicesshown in and/or described in connection with other drawing figures. TheNode B 120A, the Node B 120B, the Node B 120C, and/or the Node B 120Dmay be structurally similar to Nodes B and/or base stations shown inand/or described in connection with other drawing figures.

A base station, such as a gNB (e.g., 120A, 120B, etc.) and/or an ng-eNB(e.g., 120C, 120D, etc.) may host functions such as radio resourcemanagement and scheduling, IP header compression, encryption andintegrity protection of data, selection of Access and MobilityManagement Function (AMF) at wireless device (e.g., User Equipment (UE))attachment, routing of user plane and control plane data, connectionsetup and release, scheduling and transmission of paging messages (e.g.,originated from the AMF), scheduling and transmission of systembroadcast information (e.g., originated from the AMF or Operation andMaintenance (O&M)), measurement and measurement reporting configuration,transport level packet marking in the uplink, session management,support of network slicing, Quality of Service (QoS) flow management andmapping to data radio bearers, support of wireless devices in aninactive state (e.g., RRC_INACTIVE state), distribution function forNon-Access Stratum (NAS) messages, RAN sharing, dual connectivity,and/or tight interworking between NR and E-UTRA.

One or more first base stations (e.g., gNBs 120A and 120B) and/or one ormore second base stations (e.g., ng-eNBs 120C and 120D) may beinterconnected with each other via Xn interface. A first base station(e.g., gNB 120A, 120B, etc.) or a second base station (e.g., ng-eNB120C, 120D, etc.) may be connected via NG interfaces to a network, suchas a 5G Core Network (5GC). A 5GC may comprise one or more AMF/User PlanFunction (UPF) functions (e.g., 130A and/or 130B). A base station (e.g.,a gNB and/or an ng-eNB) may be connected to a UPF via an NG-User plane(NG-U) interface. The NG-U interface may provide delivery (e.g.,non-guaranteed delivery) of user plane Protocol Data Units (PDUs)between a RAN node and the UPF. A base station (e.g., a gNB and/or anng-eNB) may be connected to an AMF via an NG-Control plane (NG-C)interface. The NG-C interface may provide functions such as NG interfacemanagement, wireless device (e.g., UE) context management, wirelessdevice (e.g., UE) mobility management, transport of NAS messages,paging, PDU session management, configuration transfer, and/or warningmessage transmission.

A UPF may host functions such as anchor point for intra-/inter-RadioAccess Technology (RAT) mobility (e.g., if applicable), external PDUsession point of interconnect to data network, packet routing andforwarding, packet inspection and user plane part of policy ruleenforcement, traffic usage reporting, uplink classifier to supportrouting traffic flows to a data network, branching point to supportmulti-homed PDU session, quality of service (QoS) handling for userplane, packet filtering, gating, Uplink (UL)/Downlink (DL) rateenforcement, uplink traffic verification (e.g., Service Data Flow (SDF)to QoS flow mapping), downlink packet buffering, and/or downlink datanotification triggering.

An AMF may host functions such as NAS signaling termination, NASsignaling security, Access Stratum (AS) security control, inter CoreNetwork (CN) node signaling (e.g., for mobility between 3rd GenerationPartnership Project (3GPP) access networks), idle mode wireless devicereachability (e.g., control and execution of paging retransmission),registration area management, support of intra-system and inter-systemmobility, access authentication, access authorization including check ofroaming rights, mobility management control (e.g., subscription and/orpolicies), support of network slicing, and/or Session ManagementFunction (SMF) selection.

FIG. 2A shows an example user plane protocol stack. A Service DataAdaptation Protocol (SDAP) (e.g., 211 and 221), Packet Data ConvergenceProtocol (PDCP) (e.g., 212 and 222), Radio Link Control (RLC) (e.g., 213and 223), and Medium Access Control (MAC) (e.g., 214 and 224) sublayers,and a Physical (PHY) (e.g., 215 and 225) layer, may be terminated in awireless device (e.g., 110) and in a base station (e.g., 120) on anetwork side. A PHY layer may provide transport services to higherlayers (e.g., MAC, RRC, etc.). Services and/or functions of a MACsublayer may comprise mapping between logical channels and transportchannels, multiplexing and/or demultiplexing of MAC Service Data Units(SDUs) belonging to the same or different logical channels into and/orfrom Transport Blocks (TBs) delivered to and/or from the PHY layer,scheduling information reporting, error correction through HybridAutomatic Repeat request (HARQ) (e.g., one HARQ entity per carrier forCarrier Aggregation (CA)), priority handling between wireless devicessuch as by using dynamic scheduling, priority handling between logicalchannels of a wireless device such as by using logical channelprioritization, and/or padding. A MAC entity may support one or multiplenumerologies and/or transmission timings. Mapping restrictions in alogical channel prioritization may control which numerology and/ortransmission timing a logical channel may use. An RLC sublayer maysupport transparent mode (TM), unacknowledged mode (UM), and/oracknowledged mode (AM) transmission modes. The RLC configuration may beper logical channel with no dependency on numerologies and/orTransmission Time Interval (TTI) durations. Automatic Repeat Request(ARQ) may operate on any of the numerologies and/or TTI durations withwhich the logical channel is configured. Services and functions of thePDCP layer for the user plane may comprise, for example, sequencenumbering, header compression and decompression, transfer of user data,reordering and duplicate detection, PDCP PDU routing (e.g., such as forsplit bearers), retransmission of PDCP SDUs, ciphering, deciphering andintegrity protection, PDCP SDU discard, PDCP re-establishment and datarecovery for RLC AM, and/or duplication of PDCP PDUs. Services and/orfunctions of SDAP may comprise, for example, mapping between a QoS flowand a data radio bearer. Services and/or functions of SDAP may comprisemapping a Quality of Service Indicator (QFI) in DL and UL packets. Aprotocol entity of SDAP may be configured for an individual PDU session.

FIG. 2B shows an example control plane protocol stack. A PDCP (e.g., 233and 242), RLC (e.g., 234 and 243), and MAC (e.g., 235 and 244)sublayers, and a PHY (e.g., 236 and 245) layer, may be terminated in awireless device (e.g., 110), and in a base station (e.g., 120) on anetwork side, and perform service and/or functions described above. RRC(e.g., 232 and 241) may be terminated in a wireless device and a basestation on a network side. Services and/or functions of RRC may comprisebroadcast of system information related to AS and/or NAS; paging (e.g.,initiated by a 5GC or a RAN); establishment, maintenance, and/or releaseof an RRC connection between the wireless device and RAN; securityfunctions such as key management, establishment, configuration,maintenance, and/or release of Signaling Radio Bearers (SRBs) and DataRadio Bearers (DRBs); mobility functions; QoS management functions;wireless device measurement reporting and control of the reporting;detection of and recovery from radio link failure; and/or NAS messagetransfer to/from NAS from/to a wireless device. NAS control protocol(e.g., 231 and 251) may be terminated in the wireless device and AMF(e.g., 130) on a network side. NAS control protocol may performfunctions such as authentication, mobility management between a wirelessdevice and an AMF (e.g., for 3GPP access and non-3GPP access), and/orsession management between a wireless device and an SMF (e.g., for 3GPPaccess and non-3GPP access).

A base station may configure a plurality of logical channels for awireless device. A logical channel of the plurality of logical channelsmay correspond to a radio bearer. The radio bearer may be associatedwith a QoS requirement. A base station may configure a logical channelto be mapped to one or more TTIs and/or numerologies in a plurality ofTTIs and/or numerologies. The wireless device may receive DownlinkControl Information (DCI) via a Physical Downlink Control CHannel(PDCCH) indicating an uplink grant. The uplink grant may be for a firstTTI and/or a first numerology and may indicate uplink resources fortransmission of a transport block. The base station may configure eachlogical channel in the plurality of logical channels with one or moreparameters to be used by a logical channel prioritization procedure atthe MAC layer of the wireless device. The one or more parameters maycomprise, for example, priority, prioritized bit rate, etc. A logicalchannel in the plurality of logical channels may correspond to one ormore buffers comprising data associated with the logical channel. Thelogical channel prioritization procedure may allocate the uplinkresources to one or more first logical channels in the plurality oflogical channels and/or to one or more MAC Control Elements (CEs). Theone or more first logical channels may be mapped to the first TTI and/orthe first numerology. The MAC layer at the wireless device may multiplexone or more MAC CEs and/or one or more MAC SDUs (e.g., logical channel)in a MAC PDU (e.g., transport block). The MAC PDU may comprise a MACheader comprising a plurality of MAC sub-headers. A MAC sub-header inthe plurality of MAC sub-headers may correspond to a MAC CE or a MAC SUD(e.g., logical channel) in the one or more MAC CEs and/or in the one ormore MAC SDUs. A MAC CE and/or a logical channel may be configured witha Logical Channel IDentifier (LCID). An LCID for a logical channeland/or a MAC CE may be fixed and/or pre-configured. An LCID for alogical channel and/or MAC CE may be configured for the wireless deviceby the base station. The MAC sub-header corresponding to a MAC CE and/ora MAC SDU may comprise an LCID associated with the MAC CE and/or the MACSDU.

A base station may activate, deactivate, and/or impact one or moreprocesses (e.g., set values of one or more parameters of the one or moreprocesses or start and/or stop one or more timers of the one or moreprocesses) at the wireless device, for example, by using one or more MACcommands. The one or more MAC commands may comprise one or more MACcontrol elements. The one or more processes may comprise activationand/or deactivation of PDCP packet duplication for one or more radiobearers. The base station may send (e.g., transmit) a MAC CE comprisingone or more fields. The values of the fields may indicate activationand/or deactivation of PDCP duplication for the one or more radiobearers. The one or more processes may comprise Channel StateInformation (CSI) transmission of on one or more cells. The base stationmay send (e.g., transmit) one or more MAC CEs indicating activationand/or deactivation of the CSI transmission on the one or more cells.The one or more processes may comprise activation and/or deactivation ofone or more secondary cells. The base station may send (e.g., transmit)a MAC CE indicating activation and/or deactivation of one or moresecondary cells. The base station may send (e.g., transmit) one or moreMAC CEs indicating starting and/or stopping of one or more DiscontinuousReception (DRX) timers at the wireless device. The base station may send(e.g., transmit) one or more MAC CEs that indicate one or more timingadvance values for one or more Timing Advance Groups (TAGs).

FIG. 3 shows an example of base stations (base station 1, 120A, and basestation 2, 120B) and a wireless device 110. The wireless device 110 maycomprise a UE or any other wireless device. The base station (e.g.,120A, 120B) may comprise a Node B, eNB, gNB, ng-eNB, or any other basestation. A wireless device and/or a base station may perform one or morefunctions of a relay node. The base station 1, 120A, may comprise atleast one communication interface 320A (e.g., a wireless modem, anantenna, a wired modem, and/or the like), at least one processor 321A,and at least one set of program code instructions 323A that may bestored in non-transitory memory 322A and executable by the at least oneprocessor 321A. The base station 2, 120B, may comprise at least onecommunication interface 320B, at least one processor 321B, and at leastone set of program code instructions 323B that may be stored innon-transitory memory 322B and executable by the at least one processor321B.

A base station may comprise any number of sectors, for example: 1, 2, 3,4, or 6 sectors. A base station may comprise any number of cells, forexample, ranging from 1 to 50 cells or more. A cell may be categorized,for example, as a primary cell or secondary cell. At Radio ResourceControl (RRC) connection establishment, re-establishment, handover,etc., a serving cell may provide NAS (non-access stratum) mobilityinformation (e.g., Tracking Area Identifier (TAI)). At RRC connectionre-establishment and/or handover, a serving cell may provide securityinput. This serving cell may be referred to as the Primary Cell (PCell).In the downlink, a carrier corresponding to the PCell may be a DLPrimary Component Carrier (PCC). In the uplink, a carrier may be an ULPCC. Secondary Cells (SCells) may be configured to form together with aPCell a set of serving cells, for example, depending on wireless devicecapabilities. In a downlink, a carrier corresponding to an SCell may bea downlink secondary component carrier (DL SCC). In an uplink, a carriermay be an uplink secondary component carrier (UL SCC). An SCell may ormay not have an uplink carrier.

A cell, comprising a downlink carrier and optionally an uplink carrier,may be assigned a physical cell ID and/or a cell index. A carrier(downlink and/or uplink) may belong to one cell. The cell ID and/or cellindex may identify the downlink carrier and/or uplink carrier of thecell (e.g., depending on the context it is used). A cell ID may beequally referred to as a carrier ID, and a cell index may be referred toas a carrier index. A physical cell ID and/or a cell index may beassigned to a cell. A cell ID may be determined using a synchronizationsignal transmitted via a downlink carrier. A cell index may bedetermined using RRC messages. A first physical cell ID for a firstdownlink carrier may indicate that the first physical cell ID is for acell comprising the first downlink carrier. The same concept may beused, for example, with carrier activation and/or deactivation (e.g.,secondary cell activation and/or deactivation). A first carrier that isactivated may indicate that a cell comprising the first carrier isactivated.

A base station may send (e.g., transmit) to a wireless device one ormore messages (e.g., RRC messages) comprising a plurality ofconfiguration parameters for one or more cells. One or more cells maycomprise at least one primary cell and at least one secondary cell. AnRRC message may be broadcasted and/or unicasted to the wireless device.Configuration parameters may comprise common parameters and dedicatedparameters.

Services and/or functions of an RRC sublayer may comprise at least oneof: broadcast of system information related to AS and/or NAS; paginginitiated by a 5GC and/or an NG-RAN; establishment, maintenance, and/orrelease of an RRC connection between a wireless device and an NG-RAN,which may comprise at least one of addition, modification, and/orrelease of carrier aggregation; and/or addition, modification, and/orrelease of dual connectivity in NR or between E-UTRA and NR. Servicesand/or functions of an RRC sublayer may comprise at least one ofsecurity functions comprising key management; establishment,configuration, maintenance, and/or release of Signaling Radio Bearers(SRBs) and/or Data Radio Bearers (DRBs); mobility functions which maycomprise at least one of a handover (e.g., intra NR mobility orinter-RAT mobility) and/or a context transfer; and/or a wireless devicecell selection and/or reselection and/or control of cell selection andreselection. Services and/or functions of an RRC sublayer may compriseat least one of QoS management functions; a wireless device measurementconfiguration/reporting; detection of and/or recovery from radio linkfailure; and/or NAS message transfer to and/or from a core networkentity (e.g., AMF, Mobility Management Entity (MME)) from and/or to thewireless device.

An RRC sublayer may support an RRC_Idle state, an RRC_Inactive state,and/or an RRC_Connected state for a wireless device. In an RRC_Idlestate, a wireless device may perform at least one of: Public Land MobileNetwork (PLMN) selection; receiving broadcasted system information; cellselection and/or re-selection; monitoring and/or receiving a paging formobile terminated data initiated by 5GC; paging for mobile terminateddata area managed by 5GC; and/or DRX for CN paging configured via NAS.In an RRC_Inactive state, a wireless device may perform at least one of:receiving broadcasted system information; cell selection and/orre-selection; monitoring and/or receiving a RAN and/or CN paginginitiated by an NG-RAN and/or a 5GC; RAN-based notification area (RNA)managed by an NG-RAN; and/or DRX for a RAN and/or CN paging configuredby NG-RAN/NAS. In an RRC_Idle state of a wireless device, a base station(e.g., NG-RAN) may keep a 5GC-NG-RAN connection (e.g., both C/U-planes)for the wireless device; and/or store a wireless device AS context forthe wireless device. In an RRC_Connected state of a wireless device, abase station (e.g., NG-RAN) may perform at least one of: establishmentof 5GC-NG-RAN connection (both C/U-planes) for the wireless device;storing a UE AS context for the wireless device; send (e.g., transmit)and/or receive of unicast data to and/or from the wireless device;and/or network-controlled mobility based on measurement results receivedfrom the wireless device. In an RRC_Connected state of a wirelessdevice, an NG-RAN may know a cell to which the wireless device belongs.

System information (SI) may be divided into minimum SI and other SI. Theminimum SI may be periodically broadcast. The minimum SI may comprisebasic information required for initial access and/or information foracquiring any other SI broadcast periodically and/or provisionedon-demand (e.g., scheduling information). The other SI may either bebroadcast, and/or be provisioned in a dedicated manner, such as eithertriggered by a network and/or upon request from a wireless device. Aminimum SI may be transmitted via two different downlink channels usingdifferent messages (e.g., MasterinformationBlock andSystemInformationBlockType1). Another SI may be transmitted viaSystemInformationBlockType2. For a wireless device in an RRC_Connectedstate, dedicated RRC signaling may be used for the request and deliveryof the other SI. For the wireless device in the RRC_Idle state and/or inthe RRC_Inactive state, the request may trigger a random accessprocedure.

A wireless device may report its radio access capability information,which may be static. A base station may request one or more indicationsof capabilities for a wireless device to report based on bandinformation. A temporary capability restriction request may be sent bythe wireless device (e.g., if allowed by a network) to signal thelimited availability of some capabilities (e.g., due to hardwaresharing, interference, and/or overheating) to the base station. The basestation may confirm or reject the request. The temporary capabilityrestriction may be transparent to 5GC (e.g., static capabilities may bestored in 5GC).

A wireless device may have an RRC connection with a network, forexample, if CA is configured. At RRC connection establishment,re-establishment, and/or handover procedures, a serving cell may provideNAS mobility information. At RRC connection re-establishment and/orhandover, a serving cell may provide a security input. This serving cellmay be referred to as the PCell. SCells may be configured to formtogether with the PCell a set of serving cells, for example, dependingon the capabilities of the wireless device. The configured set ofserving cells for the wireless device may comprise a PCell and one ormore SCells.

The reconfiguration, addition, and/or removal of SCells may be performedby RRC messaging. At intra-NR handover, RRC may add, remove, and/orreconfigure SCells for usage with the target PCell. Dedicated RRCsignaling may be used (e.g., if adding a new SCell) to send all requiredsystem information of the SCell (e.g., if in connected mode, wirelessdevices may not acquire broadcasted system information directly from theSCells).

The purpose of an RRC connection reconfiguration procedure may be tomodify an RRC connection, (e.g., to establish, modify, and/or releaseRBs; to perform handover; to setup, modify, and/or release measurements,for example, to add, modify, and/or release SCells and cell groups). NASdedicated information may be transferred from the network to thewireless device, for example, as part of the RRC connectionreconfiguration procedure. The RRCConnectionReconfiguration message maybe a command to modify an RRC connection. One or more RRC messages mayconvey information for measurement configuration, mobility control,and/or radio resource configuration (e.g., RBs, MAC main configuration,and/or physical channel configuration), which may comprise anyassociated dedicated NAS information and/or security configuration. Thewireless device may perform an SCell release, for example, if thereceived RRC Connection Reconfiguration message includes thesCellToReleaseList. The wireless device may perform SCell additions ormodification, for example, if the received RRC ConnectionReconfiguration message includes the sCellToAddModList.

An RRC connection establishment, reestablishment, and/or resumeprocedure may be to establish, reestablish, and/or resume an RRCconnection, respectively. An RRC connection establishment procedure maycomprise SRB1 establishment. The RRC connection establishment proceduremay be used to transfer the initial NAS dedicated information and/ormessage from a wireless device to an E-UTRAN. TheRRCConnectionReestablishment message may be used to re-establish SRB1.

A measurement report procedure may be used to transfer measurementresults from a wireless device to an NG-RAN. The wireless device mayinitiate a measurement report procedure, for example, after successfulsecurity activation. A measurement report message may be used to send(e.g., transmit) measurement results.

The wireless device 110 may comprise at least one communicationinterface 310 (e.g., a wireless modem, an antenna, and/or the like), atleast one processor 314, and at least one set of program codeinstructions 316 that may be stored in non-transitory memory 315 andexecutable by the at least one processor 314. The wireless device 110may further comprise at least one of at least one speaker and/ormicrophone 311, at least one keypad 312, at least one display and/ortouchpad 313, at least one power source 317, at least one globalpositioning system (GPS) chipset 318, and/or other peripherals 319.

The processor 314 of the wireless device 110, the processor 321A of thebase station 1 120A, and/or the processor 321B of the base station 2120B may comprise at least one of a general-purpose processor, a digitalsignal processor (DSP), a controller, a microcontroller, an applicationspecific integrated circuit (ASIC), a field programmable gate array(FPGA) and/or other programmable logic device, discrete gate and/ortransistor logic, discrete hardware components, and/or the like. Theprocessor 314 of the wireless device 110, the processor 321A in basestation 1 120A, and/or the processor 321B in base station 2 120B mayperform at least one of signal coding and/or processing, dataprocessing, power control, input/output processing, and/or any otherfunctionality that may enable the wireless device 110, the base station1 120A and/or the base station 2 120B to operate in a wirelessenvironment.

The processor 314 of the wireless device 110 may be connected to and/orin communication with the speaker and/or microphone 311, the keypad 312,and/or the display and/or touchpad 313. The processor 314 may receiveuser input data from and/or provide user output data to the speakerand/or microphone 311, the keypad 312, and/or the display and/ortouchpad 313. The processor 314 in the wireless device 110 may receivepower from the power source 317 and/or may be configured to distributethe power to the other components in the wireless device 110. The powersource 317 may comprise at least one of one or more dry cell batteries,solar cells, fuel cells, and/or the like. The processor 314 may beconnected to the GPS chipset 318. The GPS chipset 318 may be configuredto provide geographic location information of the wireless device 110.

The processor 314 of the wireless device 110 may further be connected toand/or in communication with other peripherals 319, which may compriseone or more software and/or hardware modules that may provide additionalfeatures and/or functionalities. For example, the peripherals 319 maycomprise at least one of an accelerometer, a satellite transceiver, adigital camera, a universal serial bus (USB) port, a hands-free headset,a frequency modulated (FM) radio unit, a media player, an Internetbrowser, and/or the like.

The communication interface 320A of the base station 1, 120A, and/or thecommunication interface 320B of the base station 2, 120B, may beconfigured to communicate with the communication interface 310 of thewireless device 110, for example, via a wireless link 330A and/or via awireless link 330B, respectively. The communication interface 320A ofthe base station 1, 120A, may communicate with the communicationinterface 320B of the base station 2 and/or other RAN and/or corenetwork nodes.

The wireless link 330A and/or the wireless link 330B may comprise atleast one of a bi-directional link and/or a directional link. Thecommunication interface 310 of the wireless device 110 may be configuredto communicate with the communication interface 320A of the base station1 120A and/or with the communication interface 320B of the base station2 120B. The base station 1 120A and the wireless device 110, and/or thebase station 2 120B and the wireless device 110, may be configured tosend and receive transport blocks, for example, via the wireless link330A and/or via the wireless link 330B, respectively. The wireless link330A and/or the wireless link 330B may use at least one frequencycarrier. Transceiver(s) may be used. A transceiver may be a device thatcomprises both a transmitter and a receiver. Transceivers may be used indevices such as wireless devices, base stations, relay nodes, computingdevices, and/or the like. Radio technology may be implemented in thecommunication interface 310, 320A, and/or 320B, and the wireless link330A and/or 330B. The radio technology may comprise one or more elementsshown in FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D, FIG. 6, FIG. 7A, FIG. 7B,FIG. 8, and associated text, described below.

Other nodes in a wireless network (e.g., AMF, UPF, SMF, etc.) maycomprise one or more communication interfaces, one or more processors,and memory storing instructions. A node (e.g., wireless device, basestation, AMF, SMF, UPF, servers, switches, antennas, and/or the like)may comprise one or more processors, and memory storing instructionsthat when executed by the one or more processors causes the node toperform certain processes and/or functions. Single-carrier and/ormulti-carrier communication operation may be performed. A non-transitorytangible computer readable media may comprise instructions executable byone or more processors to cause operation of single-carrier and/ormulti-carrier communications. An article of manufacture may comprise anon-transitory tangible computer readable machine-accessible mediumhaving instructions encoded thereon for enabling programmable hardwareto cause a node to enable operation of single-carrier and/ormulti-carrier communications. The node may include processors, memory,interfaces, and/or the like.

An interface may comprise at least one of a hardware interface, afirmware interface, a software interface, and/or a combination thereof.The hardware interface may comprise connectors, wires, and/or electronicdevices such as drivers, amplifiers, and/or the like. The softwareinterface may comprise code stored in a memory device to implementprotocol(s), protocol layers, communication drivers, device drivers,combinations thereof, and/or the like. The firmware interface maycomprise a combination of embedded hardware and/or code stored in(and/or in communication with) a memory device to implement connections,electronic device operations, protocol(s), protocol layers,communication drivers, device drivers, hardware operations, combinationsthereof, and/or the like.

A communication network may comprise the wireless device 110, the basestation 1, 120A, the base station 2, 120B, and/or any other device. Thecommunication network may comprise any number and/or type of devices,such as, for example, computing devices, wireless devices, mobiledevices, handsets, tablets, laptops, internet of things (IoT) devices,hotspots, cellular repeaters, computing devices, and/or, more generally,user equipment (e.g., UE). Although one or more of the above types ofdevices may be referenced herein (e.g., UE, wireless device, computingdevice, etc.), it should be understood that any device herein maycomprise any one or more of the above types of devices or similardevices. The communication network, and any other network referencedherein, may comprise an LTE network, a 5G network, or any other networkfor wireless communications. Apparatuses, systems, and/or methodsdescribed herein may generally be described as implemented on one ormore devices (e.g., wireless device, base station, eNB, gNB, computingdevice, etc.), in one or more networks, but it will be understood thatone or more features and steps may be implemented on any device and/orin any network. As used throughout, the term “base station” may compriseone or more of: a base station, a node, a Node B, a gNB, an eNB, anng-eNB, a relay node (e.g., an integrated access and backhaul (IAB)node), a donor node (e.g., a donor eNB, a donor gNB, etc.), an accesspoint (e.g., a WiFi access point), a computing device, a device capableof wirelessly communicating, or any other device capable of sendingand/or receiving signals. As used throughout, the term “wireless device”may comprise one or more of: a UE, a handset, a mobile device, acomputing device, a node, a device capable of wirelessly communicating,or any other device capable of sending and/or receiving signals. Anyreference to one or more of these terms/devices also considers use ofany other term/device mentioned above.

FIG. 4A, FIG. 4B, FIG. 4C and FIG. 4D show examples of uplink anddownlink signal transmission. FIG. 4A shows an example uplinktransmitter for at least one physical channel A baseband signalrepresenting a physical uplink shared channel may perform one or morefunctions. The one or more functions may comprise at least one of:scrambling (e.g., by Scrambling); modulation of scrambled bits togenerate complex-valued symbols (e.g., by a Modulation mapper); mappingof the complex-valued modulation symbols onto one or severaltransmission layers (e.g., by a Layer mapper); transform precoding togenerate complex-valued symbols (e.g., by a Transform precoder);precoding of the complex-valued symbols (e.g., by a Precoder); mappingof precoded complex-valued symbols to resource elements (e.g., by aResource element mapper); generation of complex-valued time-domainSingle Carrier-Frequency Division Multiple Access (SC-FDMA) or CP-OFDMsignal for an antenna port (e.g., by a signal gen.); and/or the like. ASC-FDMA signal for uplink transmission may be generated, for example, iftransform precoding is enabled. A CP-OFDM signal for uplink transmissionmay be generated by FIG. 4A, for example, if transform precoding is notenabled. These functions are shown as examples and other mechanisms maybe implemented.

FIG. 4B shows an example of modulation and up-conversion to the carrierfrequency of a complex-valued SC-FDMA or CP-OFDM baseband signal for anantenna port and/or for the complex-valued Physical Random AccessCHannel (PRACH) baseband signal. Filtering may be performed prior totransmission.

FIG. 4C shows an example of downlink transmissions. The baseband signalrepresenting a downlink physical channel may perform one or morefunctions. The one or more functions may comprise: scrambling of codedbits in a codeword to be transmitted on a physical channel (e.g., byScrambling); modulation of scrambled bits to generate complex-valuedmodulation symbols (e.g., by a Modulation mapper); mapping of thecomplex-valued modulation symbols onto one or several transmissionlayers (e.g., by a Layer mapper); precoding of the complex-valuedmodulation symbols on a layer for transmission on the antenna ports(e.g., by Precoding); mapping of complex-valued modulation symbols foran antenna port to resource elements (e.g., by a Resource elementmapper); generation of complex-valued time-domain OFDM signal for anantenna port (e.g., by an OFDM signal gen.); and/or the like. Thesefunctions are shown as examples and other mechanisms may be implemented.

A base station may send (e.g., transmit) a first symbol and a secondsymbol on an antenna port, to a wireless device. The wireless device mayinfer the channel (e.g., fading gain, multipath delay, etc.) forconveying the second symbol on the antenna port, from the channel forconveying the first symbol on the antenna port. A first antenna port anda second antenna port may be quasi co-located, for example, if one ormore large-scale properties of the channel over which a first symbol onthe first antenna port is conveyed may be inferred from the channel overwhich a second symbol on a second antenna port is conveyed. The one ormore large-scale properties may comprise at least one of: delay spread;Doppler spread; Doppler shift; average gain; average delay; and/orspatial receiving (Rx) parameters.

FIG. 4D shows an example modulation and up-conversion to the carrierfrequency of the complex-valued OFDM baseband signal for an antennaport. Filtering may be performed prior to transmission.

FIG. 5A shows example uplink channel mapping and example uplink physicalsignals. A physical layer may provide one or more information transferservices to a MAC and/or one or more higher layers. The physical layermay provide the one or more information transfer services to the MAC viaone or more transport channels. An information transfer service mayindicate how and/or with what characteristics data is transferred overthe radio interface.

Uplink transport channels may comprise an Uplink-Shared CHannel (UL-SCH)501 and/or a Random Access CHannel (RACH) 502. A wireless device maysend (e.g., transmit) one or more uplink DM-RSs 506 to a base stationfor channel estimation, for example, for coherent demodulation of one ormore uplink physical channels (e.g., PUSCH 503 and/or PUCCH 504). Thewireless device may send (e.g., transmit) to a base station at least oneuplink DM-RS 506 with PUSCH 503 and/or PUCCH 504, wherein the at leastone uplink DM-RS 506 may be spanning a same frequency range as acorresponding physical channel. The base station may configure thewireless device with one or more uplink DM-RS configurations. At leastone DM-RS configuration may support a front-loaded DM-RS pattern. Afront-loaded DM-RS may be mapped over one or more OFDM symbols (e.g., 1or 2 adjacent OFDM symbols). One or more additional uplink DM-RS may beconfigured to send (e.g., transmit) at one or more symbols of a PUSCHand/or PUCCH. The base station may semi-statically configure thewireless device with a maximum number of front-loaded DM-RS symbols forPUSCH and/or PUCCH. The wireless device may schedule a single-symbolDM-RS and/or double symbol DM-RS based on a maximum number offront-loaded DM-RS symbols, wherein the base station may configure thewireless device with one or more additional uplink DM-RS for PUSCHand/or PUCCH. A new radio network may support, for example, at least forCP-OFDM, a common DM-RS structure for DL and UL, wherein a DM-RSlocation, DM-RS pattern, and/or scrambling sequence may be same ordifferent.

Whether or not an uplink PT-RS 507 is present may depend on an RRCconfiguration. A presence of the uplink PT-RS may be wirelessdevice-specifically configured. A presence and/or a pattern of theuplink PT-RS 507 in a scheduled resource may be wirelessdevice-specifically configured by a combination of RRC signaling and/orassociation with one or more parameters used for other purposes (e.g.,Modulation and Coding Scheme (MCS)) which may be indicated by DCI. Ifconfigured, a dynamic presence of uplink PT-RS 507 may be associatedwith one or more DCI parameters comprising at least a MCS. A radionetwork may support a plurality of uplink PT-RS densities defined intime/frequency domain. If present, a frequency domain density may beassociated with at least one configuration of a scheduled bandwidth. Awireless device may assume a same precoding for a DM-RS port and a PT-RSport. A number of PT-RS ports may be less than a number of DM-RS portsin a scheduled resource. The uplink PT-RS 507 may be confined in thescheduled time/frequency duration for a wireless device.

A wireless device may send (e.g., transmit) an SRS 508 to a base stationfor channel state estimation, for example, to support uplink channeldependent scheduling and/or link adaptation. The SRS 508 sent (e.g.,transmitted) by the wireless device may allow for the base station toestimate an uplink channel state at one or more different frequencies. Abase station scheduler may use an uplink channel state to assign one ormore resource blocks of a certain quality (e.g., above a qualitythreshold) for an uplink PUSCH transmission from the wireless device.The base station may semi-statically configure the wireless device withone or more SRS resource sets. For an SRS resource set, the base stationmay configure the wireless device with one or more SRS resources. An SRSresource set applicability may be configured by a higher layer (e.g.,RRC) parameter. An SRS resource in each of one or more SRS resource setsmay be sent (e.g., transmitted) at a time instant, for example, if ahigher layer parameter indicates beam management. The wireless devicemay send (e.g., transmit) one or more SRS resources in different SRSresource sets simultaneously. A new radio network may support aperiodic,periodic, and/or semi-persistent SRS transmissions. The wireless devicemay send (e.g., transmit) SRS resources, for example, based on one ormore trigger types. The one or more trigger types may comprise higherlayer signaling (e.g., RRC) and/or one or more DCI formats (e.g., atleast one DCI format may be used for a wireless device to select atleast one of one or more configured SRS resource sets). An SRS triggertype 0 may refer to an SRS triggered based on a higher layer signaling.An SRS trigger type 1 may refer to an SRS triggered based on one or moreDCI formats. The wireless device may be configured to send (e.g.,transmit) the SRS 508 after a transmission of PUSCH 503 andcorresponding uplink DM-RS 506, for example, if PUSCH 503 and the SRS508 are transmitted in a same slot.

A base station may semi-statically configure a wireless device with oneor more SRS configuration parameters indicating at least one offollowing: an SRS resource configuration identifier, a number of SRSports, time domain behavior of SRS resource configuration (e.g., anindication of periodic, semi-persistent, or aperiodic SRS), slot(mini-slot, and/or subframe) level periodicity and/or offset for aperiodic and/or aperiodic SRS resource, a number of OFDM symbols in aSRS resource, starting OFDM symbol of a SRS resource, an SRS bandwidth,a frequency hopping bandwidth, a cyclic shift, and/or an SRS sequenceID.

FIG. 5B shows an example downlink channel mapping and downlink physicalsignals. Downlink transport channels may comprise a Downlink-SharedCHannel (DL-SCH) 511, a Paging CHannel (PCH) 512, and/or a BroadcastCHannel (BCH) 513. A transport channel may be mapped to one or morecorresponding physical channels. A UL-SCH 501 may be mapped to aPhysical Uplink Shared CHannel (PUSCH) 503. A RACH 502 may be mapped toa PRACH 505. A DL-SCH 511 and a PCH 512 may be mapped to a PhysicalDownlink Shared CHannel (PDSCH) 514. A BCH 513 may be mapped to aPhysical Broadcast CHannel (PBCH) 516.

A radio network may comprise one or more downlink and/or uplinktransport channels. The radio network may comprise one or more physicalchannels without a corresponding transport channel. The one or morephysical channels may be used for an Uplink Control Information (UCI)509 and/or a Downlink Control Information (DCI) 517. A Physical UplinkControl CHannel (PUCCH) 504 may carry UCI 509 from a wireless device toa base station. A Physical Downlink Control CHannel (PDCCH) 515 maycarry the DCI 517 from a base station to a wireless device. The radionetwork (e.g., NR) may support the UCI 509 multiplexing in the PUSCH503, for example, if the UCI 509 and the PUSCH 503 transmissions maycoincide in a slot (e.g., at least in part). The UCI 509 may comprise atleast one of a CSI, an Acknowledgement (ACK)/Negative Acknowledgement(NACK), and/or a scheduling request. The DCI 517 via the PDCCH 515 mayindicate at least one of following: one or more downlink assignmentsand/or one or more uplink scheduling grants.

In uplink, a wireless device may send (e.g., transmit) one or moreReference Signals (RSs) to a base station. The one or more RSs maycomprise at least one of a Demodulation-RS (DM-RS) 506, a PhaseTracking-RS (PT-RS) 507, and/or a Sounding RS (SRS) 508. In downlink, abase station may send (e.g., transmit, unicast, multicast, and/orbroadcast) one or more RSs to a wireless device. The one or more RSs maycomprise at least one of a Primary Synchronization Signal(PSS)/Secondary Synchronization Signal (SSS) 521, a CSI-RS 522, a DM-RS523, and/or a PT-RS 524.

In a time domain, an SS/PBCH block may comprise one or more OFDM symbols(e.g., 4 OFDM symbols numbered in increasing order from 0 to 3) withinthe SS/PBCH block. An SS/PBCH block may comprise the PSS/SSS 521 and/orthe PBCH 516. In the frequency domain, an SS/PBCH block may comprise oneor more contiguous subcarriers (e.g., 240 contiguous subcarriers withthe subcarriers numbered in increasing order from 0 to 239) within theSS/PBCH block. The PSS/SSS 521 may occupy, for example, 1 OFDM symboland 127 subcarriers. The PBCH 516 may span across, for example, 3 OFDMsymbols and 240 subcarriers. A wireless device may assume that one ormore SS/PBCH blocks transmitted with a same block index may be quasico-located, for example, with respect to Doppler spread, Doppler shift,average gain, average delay, and/or spatial Rx parameters. A wirelessdevice may not assume quasi co-location for other SS/PBCH blocktransmissions. A periodicity of an SS/PBCH block may be configured by aradio network (e.g., by an RRC signaling). One or more time locations inwhich the SS/PBCH block may be sent may be determined by sub-carrierspacing. A wireless device may assume a band-specific sub-carrierspacing for an SS/PBCH block, for example, unless a radio network hasconfigured the wireless device to assume a different sub-carrierspacing.

The downlink CSI-RS 522 may be used for a wireless device to acquirechannel state information. A radio network may support periodic,aperiodic, and/or semi-persistent transmission of the downlink CSI-RS522. A base station may semi-statically configure and/or reconfigure awireless device with periodic transmission of the downlink CSI-RS 522. Aconfigured CSI-RS resources may be activated and/or deactivated. Forsemi-persistent transmission, an activation and/or deactivation of aCSI-RS resource may be triggered dynamically. A CSI-RS configuration maycomprise one or more parameters indicating at least a number of antennaports. A base station may configure a wireless device with 32 ports, orany other number of ports. A base station may semi-statically configurea wireless device with one or more CSI-RS resource sets. One or moreCSI-RS resources may be allocated from one or more CSI-RS resource setsto one or more wireless devices. A base station may semi-staticallyconfigure one or more parameters indicating CSI RS resource mapping, forexample, time-domain location of one or more CSI-RS resources, abandwidth of a CSI-RS resource, and/or a periodicity. A wireless devicemay be configured to use the same OFDM symbols for the downlink CSI-RS522 and the Control Resource Set (CORESET), for example, if the downlinkCSI-RS 522 and the CORESET are spatially quasi co-located and resourceelements associated with the downlink CSI-RS 522 are the outside of PRBsconfigured for the CORESET. A wireless device may be configured to usethe same OFDM symbols for downlink CSI-RS 522 and SS/PBCH blocks, forexample, if the downlink CSI-RS 522 and SS/PBCH blocks are spatiallyquasi co-located and resource elements associated with the downlinkCSI-RS 522 are outside of the PRBs configured for the SS/PBCH blocks.

A wireless device may send (e.g., transmit) one or more downlink DM-RSs523 to a base station for channel estimation, for example, for coherentdemodulation of one or more downlink physical channels (e.g., PDSCH514). A radio network may support one or more variable and/orconfigurable DM-RS patterns for data demodulation. At least one downlinkDM-RS configuration may support a front-loaded DM-RS pattern. Afront-loaded DM-RS may be mapped over one or more OFDM symbols (e.g., 1or 2 adjacent OFDM symbols). A base station may semi-staticallyconfigure a wireless device with a maximum number of front-loaded DM-RSsymbols for PDSCH 514. A DM-RS configuration may support one or moreDM-RS ports. A DM-RS configuration may support at least 8 orthogonaldownlink DM-RS ports, for example, for single user-MIMO. ADM-RSconfiguration may support 12 orthogonal downlink DM-RS ports, forexample, for multiuser-MIMO. A radio network may support, for example,at least for CP-OFDM, a common DM-RS structure for DL and UL, wherein aDM-RS location, DM-RS pattern, and/or scrambling sequence may be thesame or different.

Whether or not the downlink PT-RS 524 is present may depend on an RRCconfiguration. A presence of the downlink PT-RS 524 may be wirelessdevice-specifically configured. A presence and/or a pattern of thedownlink PT-RS 524 in a scheduled resource may be wirelessdevice-specifically configured, for example, by a combination of RRCsignaling and/or an association with one or more parameters used forother purposes (e.g., MCS) which may be indicated by the DCI. Ifconfigured, a dynamic presence of the downlink PT-RS 524 may beassociated with one or more DCI parameters comprising at least MCS. Aradio network may support a plurality of PT-RS densities in atime/frequency domain. If present, a frequency domain density may beassociated with at least one configuration of a scheduled bandwidth. Awireless device may assume the same precoding for a DM-RS port and aPT-RS port. A number of PT-RS ports may be less than a number of DM-RSports in a scheduled resource. The downlink PT-RS 524 may be confined inthe scheduled time/frequency duration for a wireless device.

FIG. 6 shows an example transmission time and reception time, as well asan example frame structure, for a carrier. A multicarrier OFDMcommunication system may include one or more carriers, for example,ranging from 1 to 32 carriers (such as for carrier aggregation) orranging from 1 to 64 carriers (such as for dual connectivity). Differentradio frame structures may be supported (e.g., for FDD and/or for TDDduplex mechanisms). FIG. 6 shows an example frame timing. Downlink anduplink transmissions may be organized into radio frames 601. Radio frameduration may be 10 milliseconds (ms). A 10 ms radio frame 601 may bedivided into ten equally sized subframes 602, each with a 1 ms duration.Subframe(s) may comprise one or more slots (e.g., slots 603 and 605)depending on subcarrier spacing and/or CP length. For example, asubframe with 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz and 480 kHzsubcarrier spacing may comprise one, two, four, eight, sixteen andthirty-two slots, respectively. In FIG. 6, a subframe may be dividedinto two equally sized slots 603 with 0.5 ms duration. For example, 10subframes may be available for downlink transmission and 10 subframesmay be available for uplink transmissions in a 10 ms interval. Othersubframe durations such as, for example, 0.5 ms, 1 ms, 2 ms, and 5 msmay be supported. Uplink and downlink transmissions may be separated inthe frequency domain. Slot(s) may include a plurality of OFDM symbols604. The number of OFDM symbols 604 in a slot 605 may depend on thecyclic prefix length. A slot may be 14 OFDM symbols for the samesubcarrier spacing of up to 480 kHz with normal CP. A slot may be 12OFDM symbols for the same subcarrier spacing of 60 kHz with extended CP.A slot may comprise downlink, uplink, and/or a downlink part and anuplink part, and/or alike.

FIG. 7A shows example sets of OFDM subcarriers. A base station maycommunicate with a wireless device using a carrier having an examplechannel bandwidth 700. Arrow(s) in the example may depict a subcarrierin a multicarrier OFDM system. The OFDM system may use technology suchas OFDM technology, SC-FDMA technology, and/or the like. An arrow 701shows a subcarrier transmitting information symbols. A subcarrierspacing 702, between two contiguous subcarriers in a carrier, may be anyone of 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, or any other frequency.Different subcarrier spacing may correspond to different transmissionnumerologies. A transmission numerology may comprise at least: anumerology index; a value of subcarrier spacing; and/or a type of cyclicprefix (CP). A base station may send (e.g., transmit) to and/or receivefrom a wireless device via a number of subcarriers 703 in a carrier. Abandwidth occupied by a number of subcarriers 703 (e.g., transmissionbandwidth) may be smaller than the channel bandwidth 700 of a carrier,for example, due to guard bands 704 and 705. Guard bands 704 and 705 maybe used to reduce interference to and from one or more neighborcarriers. A number of subcarriers (e.g., transmission bandwidth) in acarrier may depend on the channel bandwidth of the carrier and/or thesubcarrier spacing. A transmission bandwidth, for a carrier with a 20MHz channel bandwidth and a 15 kHz subcarrier spacing, may be in numberof 1024 subcarriers.

A base station and a wireless device may communicate with multiplecomponent carriers (CCs), for example, if configured with CA. Differentcomponent carriers may have different bandwidth and/or differentsubcarrier spacing, for example, if CA is supported. A base station maysend (e.g., transmit) a first type of service to a wireless device via afirst component carrier. The base station may send (e.g., transmit) asecond type of service to the wireless device via a second componentcarrier. Different types of services may have different servicerequirements (e.g., data rate, latency, reliability), which may besuitable for transmission via different component carriers havingdifferent subcarrier spacing and/or different bandwidth.

FIG. 7B shows examples of component carriers. A first component carriermay comprise a first number of subcarriers 706 having a first subcarrierspacing 709. A second component carrier may comprise a second number ofsubcarriers 707 having a second subcarrier spacing 710. A thirdcomponent carrier may comprise a third number of subcarriers 708 havinga third subcarrier spacing 711. Carriers in a multicarrier OFDMcommunication system may be contiguous carriers, non-contiguouscarriers, or a combination of both contiguous and non-contiguouscarriers.

FIG. 8 shows an example of OFDM radio resources. A carrier may have atransmission bandwidth 801. A resource grid may be in a structure offrequency domain 802 and time domain 803. A resource grid may comprise afirst number of OFDM symbols in a subframe and a second number ofresource blocks, starting from a common resource block indicated byhigher-layer signaling (e.g., RRC signaling), for a transmissionnumerology and a carrier. In a resource grid, a resource element 805 maycomprise a resource unit that may be identified by a subcarrier indexand a symbol index. A subframe may comprise a first number of OFDMsymbols 807 that may depend on a numerology associated with a carrier. Asubframe may have 14 OFDM symbols for a carrier, for example, if asubcarrier spacing of a numerology of a carrier is 15 kHz. A subframemay have 28 OFDM symbols, for example, if a subcarrier spacing of anumerology is 30 kHz. A subframe may have 56 OFDM symbols, for example,if a subcarrier spacing of a numerology is 60 kHz. A subcarrier spacingof a numerology may comprise any other frequency. A second number ofresource blocks comprised in a resource grid of a carrier may depend ona bandwidth and a numerology of the carrier.

A resource block 806 may comprise 12 subcarriers. Multiple resourceblocks may be grouped into a Resource Block Group (RBG) 804. A size of aRBG may depend on at least one of: a RRC message indicating a RBG sizeconfiguration; a size of a carrier bandwidth; and/or a size of abandwidth part of a carrier. A carrier may comprise multiple bandwidthparts. A first bandwidth part of a carrier may have a differentfrequency location and/or a different bandwidth from a second bandwidthpart of the carrier.

A base station may send (e.g., transmit), to a wireless device, adownlink control information comprising a downlink or uplink resourceblock assignment. A base station may send (e.g., transmit) to and/orreceive from, a wireless device, data packets (e.g., transport blocks).The data packets may be scheduled on and transmitted via one or moreresource blocks and one or more slots indicated by parameters indownlink control information and/or RRC message(s). A starting symbolrelative to a first slot of the one or more slots may be indicated tothe wireless device. A base station may send (e.g., transmit) to and/orreceive from, a wireless device, data packets. The data packets may bescheduled for transmission on one or more RBGs and in one or more slots.

A base station may send (e.g., transmit), to a wireless device, downlinkcontrol information comprising a downlink assignment. The base stationmay send (e.g., transmit) the DCI via one or more PDCCHs. The downlinkassignment may comprise parameters indicating at least one of amodulation and coding format; resource allocation; and/or HARQinformation related to the DL-SCH. The resource allocation may compriseparameters of resource block allocation; and/or slot allocation. A basestation may allocate (e.g., dynamically) resources to a wireless device,for example, via a Cell-Radio Network Temporary Identifier (C-RNTI) onone or more PDCCHs. The wireless device may monitor the one or morePDCCHs, for example, in order to find possible allocation if itsdownlink reception is enabled. The wireless device may receive one ormore downlink data packets on one or more PDSCH scheduled by the one ormore PDCCHs, for example, if the wireless device successfully detectsthe one or more PDCCHs.

A base station may allocate Configured Scheduling (CS) resources fordown link transmission to a wireless device. The base station may send(e.g., transmit) one or more RRC messages indicating a periodicity ofthe CS grant. The base station may send (e.g., transmit) DCI via a PDCCHaddressed to a Configured Scheduling-RNTI (CS-RNTI) activating the CSresources. The DCI may comprise parameters indicating that the downlinkgrant is a CS grant. The CS grant may be implicitly reused according tothe periodicity defined by the one or more RRC messages. The CS grantmay be implicitly reused, for example, until deactivated.

A base station may send (e.g., transmit), to a wireless device via oneor more PDCCHs, downlink control information comprising an uplink grant.The uplink grant may comprise parameters indicating at least one of amodulation and coding format; a resource allocation; and/or HARQinformation related to the UL-SCH. The resource allocation may compriseparameters of resource block allocation; and/or slot allocation. Thebase station may dynamically allocate resources to the wireless devicevia a C-RNTI on one or more PDCCHs. The wireless device may monitor theone or more PDCCHs, for example, in order to find possible resourceallocation. The wireless device may send (e.g., transmit) one or moreuplink data packets via one or more PUSCH scheduled by the one or morePDCCHs, for example, if the wireless device successfully detects the oneor more PDCCHs.

The base station may allocate CS resources for uplink data transmissionto a wireless device. The base station may transmit one or more RRCmessages indicating a periodicity of the CS grant. The base station maysend (e.g., transmit) DCI via a PDCCH addressed to a CS-RNTI to activatethe CS resources. The DCI may comprise parameters indicating that theuplink grant is a CS grant. The CS grant may be implicitly reusedaccording to the periodicity defined by the one or more RRC message, TheCS grant may be implicitly reused, for example, until deactivated.

A base station may send (e.g., transmit) DCI and/or control signalingvia a PDCCH. The DCI may comprise a format of a plurality of formats.The DCI may comprise downlink and/or uplink scheduling information(e.g., resource allocation information, HARQ related parameters, MCS),request(s) for CSI (e.g., aperiodic CQI reports), request(s) for an SRS,uplink power control commands for one or more cells, one or more timinginformation (e.g., TB transmission/reception timing, HARQ feedbacktiming, etc.), and/or the like. The DCI may indicate an uplink grantcomprising transmission parameters for one or more transport blocks. TheDCI may indicate a downlink assignment indicating parameters forreceiving one or more transport blocks. The DCI may be used by the basestation to initiate a contention-free random access at the wirelessdevice. The base station may send (e.g., transmit) DCI comprising a slotformat indicator (SFI) indicating a slot format. The base station maysend (e.g., transmit) DCI comprising a preemption indication indicatingthe PRB(s) and/or OFDM symbol(s) in which a wireless device may assumeno transmission is intended for the wireless device. The base stationmay send (e.g., transmit) DCI for group power control of the PUCCH, thePUSCH, and/or an SRS. DCI may correspond to an RNTI. The wireless devicemay obtain an RNTI after or in response to completing the initial access(e.g., C-RNTI). The base station may configure an RNTI for the wireless(e.g., CS-RNTI, TPC-CS-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI,TPC-SRS-RNTI, etc.). The wireless device may determine (e.g., compute)an RNTI (e.g., the wireless device may determine the RA-RNTI based onresources used for transmission of a preamble). An RNTI may have apre-configured value (e.g., P-RNTI or SI-RNTI). The wireless device maymonitor a group common search space which may be used by the basestation for sending (e.g., transmitting) DCIs that are intended for agroup of wireless devices. A group common DCI may correspond to an RNTIwhich is commonly configured for a group of wireless devices. Thewireless device may monitor a wireless device-specific search space. Awireless device specific DCI may correspond to an RNTI configured forthe wireless device.

A communications system (e.g., an NR system) may support a single beamoperation and/or a multi-beam operation. In a multi-beam operation, abase station may perform a downlink beam sweeping to provide coveragefor common control channels and/or downlink SS blocks, which maycomprise at least a PSS, a SSS, and/or PBCH. A wireless device maymeasure quality of a beam pair link using one or more RSs. One or moreSS blocks, or one or more CSI-RS resources (e.g., which may beassociated with a CSI-RS resource index (CRI)), and/or one or moreDM-RSs of a PBCH, may be used as an RS for measuring a quality of a beampair link. The quality of a beam pair link may be based on a referencesignal received power (RSRP) value, a reference signal received quality(RSRQ) value, and/or a CSI value measured on RS resources. The basestation may indicate whether an RS resource, used for measuring a beampair link quality, is quasi-co-located (QCLed) with DM-RSs of a controlchannel. An RS resource and DM-RSs of a control channel may be calledQCLed, for example, if channel characteristics from a transmission on anRS to a wireless device, and that from a transmission on a controlchannel to a wireless device, are similar or the same under a configuredcriterion. In a multi-beam operation, a wireless device may perform anuplink beam sweeping to access a cell.

A wireless device may be configured to monitor a PDCCH on one or morebeam pair links simultaneously, for example, depending on a capabilityof the wireless device. This monitoring may increase robustness againstbeam pair link blocking. A base station may send (e.g., transmit) one ormore messages to configure the wireless device to monitor the PDCCH onone or more beam pair links in different PDCCH OFDM symbols. A basestation may send (e.g., transmit) higher layer signaling (e.g., RRCsignaling) and/or a MAC CE comprising parameters related to the Rx beamsetting of the wireless device for monitoring the PDCCH on one or morebeam pair links. The base station may send (e.g., transmit) anindication of a spatial QCL assumption between an DL RS antenna port(s)(e.g., a cell-specific CSI-RS, a wireless device-specific CSI-RS, an SSblock, and/or a PBCH with or without DM-RSs of the PBCH) and/or DL RSantenna port(s) for demodulation of a DL control channel. Signaling forbeam indication for a PDCCH may comprise MAC CE signaling, RRCsignaling, DCI signaling, and/or specification-transparent and/orimplicit method, and/or any combination of signaling methods.

A base station may indicate spatial QCL parameters between DL RS antennaport(s) and DM-RS antenna port(s) of a DL data channel, for example, forreception of a unicast DL data channel. The base station may send (e.g.,transmit) DCI (e.g., downlink grants) comprising information indicatingthe RS antenna port(s). The information may indicate RS antenna port(s)that may be QCL-ed with the DM-RS antenna port(s). A different set ofDM-RS antenna port(s) for a DL data channel may be indicated as QCL witha different set of the RS antenna port(s).

FIG. 9A shows an example of beam sweeping in a DL channel. In anRRC_INACTIVE state or RRC_IDLE state, a wireless device may assume thatSS blocks form an SS burst 940, and an SS burst set 950. The SS burstset 950 may have a given periodicity. A base station 120 may send (e.g.,transmit) SS blocks in multiple beams, together forming a SS burst 940,for example, in a multi-beam operation. One or more SS blocks may besent (e.g., transmitted) on one beam. If multiple SS bursts 940 aretransmitted with multiple beams, SS bursts together may form SS burstset 950.

A wireless device may use CSI-RS for estimating a beam quality of a linkbetween a wireless device and a base station, for example, in the multibeam operation. A beam may be associated with a CSI-RS. A wirelessdevice may (e.g., based on a RSRP measurement on CSI-RS) report a beamindex, which may be indicated in a CRI for downlink beam selectionand/or associated with an RSRP value of a beam. A CSI-RS may be sent(e.g., transmitted) on a CSI-RS resource, which may comprise at leastone of: one or more antenna ports and/or one or more time and/orfrequency radio resources. A CSI-RS resource may be configured in acell-specific way such as by common RRC signaling, or in a wirelessdevice-specific way such as by dedicated RRC signaling and/or L1/L2signaling. Multiple wireless devices covered by a cell may measure acell-specific CSI-RS resource. A dedicated subset of wireless devicescovered by a cell may measure a wireless device-specific CSI-RSresource.

A CSI-RS resource may be sent (e.g., transmitted) periodically, usingaperiodic transmission, or using a multi-shot or semi-persistenttransmission. In a periodic transmission in FIG. 9A, a base station 120may send (e.g., transmit) configured CSI-RS resources 940 periodicallyusing a configured periodicity in a time domain. In an aperiodictransmission, a configured CSI-RS resource may be sent (e.g.,transmitted) in a dedicated time slot. In a multi-shot and/orsemi-persistent transmission, a configured CSI-RS resource may be sent(e.g., transmitted) within a configured period. Beams used for CSI-RStransmission may have a different beam width than beams used forSS-blocks transmission.

FIG. 9B shows an example of a beam management procedure, such as in anexample new radio network. The base station 120 and/or the wirelessdevice 110 may perform a downlink L1/L2 beam management procedure. Oneor more of the following downlink L1/L2 beam management procedures maybe performed within one or more wireless devices 110 and one or morebase stations 120. A P1 procedure 910 may be used to enable the wirelessdevice 110 to measure one or more Transmission (Tx) beams associatedwith the base station 120, for example, to support a selection of afirst set of Tx beams associated with the base station 120 and a firstset of Rx beam(s) associated with the wireless device 110. A basestation 120 may sweep a set of different Tx beams, for example, forbeamforming at a base station 120 (such as shown in the top row, in acounter-clockwise direction). A wireless device 110 may sweep a set ofdifferent Rx beams, for example, for beamforming at a wireless device110 (such as shown in the bottom row, in a clockwise direction). A P2procedure 920 may be used to enable a wireless device 110 to measure oneor more Tx beams associated with a base station 120, for example, topossibly change a first set of Tx beams associated with a base station120. A P2 procedure 920 may be performed on a possibly smaller set ofbeams (e.g., for beam refinement) than in the P1 procedure 910. A P2procedure 920 may be a special example of a P1 procedure 910. A P3procedure 930 may be used to enable a wireless device 110 to measure atleast one Tx beam associated with a base station 120, for example, tochange a first set of Rx beams associated with a wireless device 110.

A wireless device 110 may send (e.g., transmit) one or more beammanagement reports to a base station 120. In one or more beam managementreports, a wireless device 110 may indicate one or more beam pairquality parameters comprising one or more of: a beam identification; anRSRP; a Precoding Matrix Indicator (PMI), Channel Quality Indicator(CQI), and/or Rank Indicator (RI) of a subset of configured beams. Basedon one or more beam management reports, the base station 120 may send(e.g., transmit) to a wireless device 110 a signal indicating that oneor more beam pair links are one or more serving beams. The base station120 may send (e.g., transmit) the PDCCH and the PDSCH for a wirelessdevice 110 using one or more serving beams.

A communications network (e.g., a new radio network) may support aBandwidth Adaptation (BA). Receive and/or transmit bandwidths that maybe configured for a wireless device using a BA may not be large. Receiveand/or transmit bandwidth may not be as large as a bandwidth of a cell.Receive and/or transmit bandwidths may be adjustable. A wireless devicemay change receive and/or transmit bandwidths, for example, to reduce(e.g., shrink) the bandwidth(s) at (e.g., during) a period of lowactivity such as to save power. A wireless device may change a locationof receive and/or transmit bandwidths in a frequency domain, forexample, to increase scheduling flexibility. A wireless device maychange a subcarrier spacing, for example, to allow different services.

A Bandwidth Part (BWP) may comprise a subset of a total cell bandwidthof a cell. A base station may configure a wireless device with one ormore BWPs, for example, to achieve a BA. A base station may indicate, toa wireless device, which of the one or more (configured) BWPs is anactive BWP.

FIG. 10 shows an example of BWP configurations. BWPs may be configuredas follows: BWP1 (1010 and 1050) with a width of 40 MHz and subcarrierspacing of 15 kHz; BWP2 (1020 and 1040) with a width of 10 MHz andsubcarrier spacing of 15 kHz; BWP3 1030 with a width of 20 MHz andsubcarrier spacing of 60 kHz. Any number of BWP configurations maycomprise any other width and subcarrier spacing combination.

A wireless device, configured for operation in one or more BWPs of acell, may be configured by one or more higher layers (e.g., RRC layer).The wireless device may be configured for a cell with: a set of one ormore BWPs (e.g., at most four BWPs) for reception (e.g., a DL BWP set)in a DL bandwidth by at least one parameter DL-BWP; and a set of one ormore BWPs (e.g., at most four BWPs) for transmissions (e.g., UL BWP set)in an UL bandwidth by at least one parameter UL-BWP.

A base station may configure a wireless device with one or more UL andDL BWP pairs, for example, to enable BA on the PCell. To enable BA onSCells (e.g., for CA), a base station may configure a wireless device atleast with one or more DL BWPs (e.g., there may be none in an UL).

An initial active DL BWP may comprise at least one of a location andnumber of contiguous PRBs, a subcarrier spacing, or a cyclic prefix, forexample, for a CORESETs for at least one common search space. Foroperation on the PCell, one or more higher layer parameters may indicateat least one initial UL BWP for a random access procedure. If a wirelessdevice is configured with a secondary carrier on a primary cell, thewireless device may be configured with an initial BWP for random accessprocedure on a secondary carrier.

A wireless device may expect that a center frequency for a DL BWP may besame as a center frequency for a UL BWP, for example, for unpairedspectrum operation. A base station may semi-statically configure awireless device for a cell with one or more parameters, for example, fora DL BWP or an UL BWP in a set of one or more DL BWPs or one or more ULBWPs, respectively. The one or more parameters may indicate one or moreof following: a subcarrier spacing; a cyclic prefix; a number ofcontiguous PRBs; an index in the set of one or more DL BWPs and/or oneor more UL BWPs; a link between a DL BWP and an UL BWP from a set ofconfigured DL BWPs and UL BWPs; a DCI detection to a PDSCH receptiontiming; a PDSCH reception to a HARQ-ACK transmission timing value; a DCIdetection to a PUSCH transmission timing value; and/or an offset of afirst PRB of a DL bandwidth or an UL bandwidth, respectively, relativeto a first PRB of a bandwidth.

For a DL BWP in a set of one or more DL BWPs on a PCell, a base stationmay configure a wireless device with one or more control resource setsfor at least one type of common search space and/or one wirelessdevice-specific search space. A base station may not configure awireless device without a common search space on a PCell, or on aPSCell, in an active DL BWP. For an UL BWP in a set of one or more ULBWPs, a base station may configure a wireless device with one or moreresource sets for one or more PUCCH transmissions.

DCI may comprise a BWP indicator field. The BWP indicator field valuemay indicate an active DL BWP, from a configured DL BWP set, for one ormore DL receptions. The BWP indicator field value may indicate an activeUL BWP, from a configured UL BWP set, for one or more UL transmissions.

For a PCell, a base station may semi-statically configure a wirelessdevice with a default DL BWP among configured DL BWPs. If a wirelessdevice is not provided a default DL BWP, a default BWP may be an initialactive DL BWP.

A base station may configure a wireless device with a timer value for aPCell. A wireless device may start a timer (e.g., a BWP inactivitytimer), for example, if a wireless device detects DCI indicating anactive DL BWP, other than a default DL BWP, for a paired spectrumoperation, and/or if a wireless device detects DCI indicating an activeDL BWP or UL BWP, other than a default DL BWP or UL BWP, for an unpairedspectrum operation. The wireless device may increment the timer by aninterval of a first value (e.g., the first value may be 1 millisecond,0.5 milliseconds, or any other time duration), for example, if thewireless device does not detect DCI at (e.g., during) the interval for apaired spectrum operation or for an unpaired spectrum operation. Thetimer may expire at a time that the timer is equal to the timer value. Awireless device may switch to the default DL BWP from an active DL BWP,for example, if the timer expires.

A base station may semi-statically configure a wireless device with oneor more BWPs. A wireless device may switch an active BWP from a firstBWP to a second BWP, for example, after or in response to receiving DCIindicating the second BWP as an active BWP, and/or after or in responseto an expiry of BWP inactivity timer (e.g., the second BWP may be adefault BWP). FIG. 10 shows an example of three BWPs configured, BWP1(1010 and 1050), BWP2 (1020 and 1040), and BWP3 (1030). BWP2 (1020 and1040) may be a default BWP. BWP1 (1010) may be an initial active BWP. Awireless device may switch an active BWP from BWP1 1010 to BWP2 1020,for example, after or in response to an expiry of the BWP inactivitytimer. A wireless device may switch an active BWP from BWP2 1020 to BWP31030, for example, after or in response to receiving DCI indicating BWP31030 as an active BWP. Switching an active BWP from BWP3 1030 to BWP21040 and/or from BWP2 1040 to BWP1 1050 may be after or in response toreceiving DCI indicating an active BWP, and/or after or in response toan expiry of BWP inactivity timer.

Wireless device procedures on a secondary cell may be same as on aprimary cell using the timer value for the secondary cell and thedefault DL BWP for the secondary cell, for example, if a wireless deviceis configured for a secondary cell with a default DL BWP amongconfigured DL BWPs and a timer value. A wireless device may use anindicated DL BWP and an indicated UL BWP on a secondary cell as arespective first active DL BWP and first active UL BWP on a secondarycell or carrier, for example, if a base station configures a wirelessdevice with a first active DL BWP and a first active UL BWP on asecondary cell or carrier.

FIG. 11A and FIG. 11B show packet flows using a multi connectivity(e.g., dual connectivity, multi connectivity, tight interworking, and/orthe like). FIG. 11A shows an example of a protocol structure of awireless device 110 (e.g., UE) with CA and/or multi connectivity. FIG.11B shows an example of a protocol structure of multiple base stationswith CA and/or multi connectivity. The multiple base stations maycomprise a master node, MN 1130 (e.g., a master node, a master basestation, a master gNB, a master eNB, and/or the like) and a secondarynode, SN 1150 (e.g., a secondary node, a secondary base station, asecondary gNB, a secondary eNB, and/or the like). A master node 1130 anda secondary node 1150 may co-work to communicate with a wireless device110.

If multi connectivity is configured for a wireless device 110, thewireless device 110, which may support multiple reception and/ortransmission functions in an RRC connected state, may be configured toutilize radio resources provided by multiple schedulers of a multiplebase stations. Multiple base stations may be inter-connected via anon-ideal or ideal backhaul (e.g., Xn interface, X2 interface, and/orthe like). A base station involved in multi connectivity for a certainwireless device may perform at least one of two different roles: a basestation may act as a master base station or act as a secondary basestation. In multi connectivity, a wireless device may be connected toone master base station and one or more secondary base stations. Amaster base station (e.g., the MN 1130) may provide a master cell group(MCG) comprising a primary cell and/or one or more secondary cells for awireless device (e.g., the wireless device 110). A secondary basestation (e.g., the SN 1150) may provide a secondary cell group (SCG)comprising a primary secondary cell (PSCell) and/or one or moresecondary cells for a wireless device (e.g., the wireless device 110).

In multi connectivity, a radio protocol architecture that a bearer usesmay depend on how a bearer is setup. Three different types of bearersetup options may be supported: an MCG bearer, an SCG bearer, and/or asplit bearer. A wireless device may receive and/or send (e.g., transmit)packets of an MCG bearer via one or more cells of the MCG. A wirelessdevice may receive and/or send (e.g., transmit) packets of an SCG bearervia one or more cells of an SCG. Multi-connectivity may indicate havingat least one bearer configured to use radio resources provided by thesecondary base station. Multi-connectivity may or may not be configuredand/or implemented.

A wireless device (e.g., wireless device 110) may send (e.g., transmit)and/or receive: packets of an MCG bearer via an SDAP layer (e.g., SDAP1110), a PDCP layer (e.g., NR PDCP 1111), an RLC layer (e.g., MN RLC1114), and a MAC layer (e.g., MN MAC 1118); packets of a split bearervia an SDAP layer (e.g., SDAP 1110), a PDCP layer (e.g., NR PDCP 1112),one of a master or secondary RLC layer (e.g., MN RLC 1115, SN RLC 1116),and one of a master or secondary MAC layer (e.g., MN MAC 1118, SN MAC1119); and/or packets of an SCG bearer via an SDAP layer (e.g., SDAP1110), a PDCP layer (e.g., NR PDCP 1113), an RLC layer (e.g., SN RLC1117), and a MAC layer (e.g., MN MAC 1119).

A master base station (e.g., MN 1130) and/or a secondary base station(e.g., SN 1150) may send (e.g., transmit) and/or receive: packets of anMCG bearer via a master or secondary node SDAP layer (e.g., SDAP 1120,SDAP 1140), a master or secondary node PDCP layer (e.g., NR PDCP 1121,NR PDCP 1142), a master node RLC layer (e.g., MN RLC 1124, MN RLC 1125),and a master node MAC layer (e.g., MN MAC 1128); packets of an SCGbearer via a master or secondary node SDAP layer (e.g., SDAP 1120, SDAP1140), a master or secondary node PDCP layer (e.g., NR PDCP 1122, NRPDCP 1143), a secondary node RLC layer (e.g., SN RLC 1146, SN RLC 1147),and a secondary node MAC layer (e.g., SN MAC 1148); packets of a splitbearer via a master or secondary node SDAP layer (e.g., SDAP 1120, SDAP1140), a master or secondary node PDCP layer (e.g., NR PDCP 1123, NRPDCP 1141), a master or secondary node RLC layer (e.g., MN RLC 1126, SNRLC 1144, SN RLC 1145, MN RLC 1127), and a master or secondary node MAClayer (e.g., MN MAC 1128, SN MAC 1148).

In multi connectivity, a wireless device may configure multiple MACentities, such as one MAC entity (e.g., MN MAC 1118) for a master basestation, and other MAC entities (e.g., SN MAC 1119) for a secondary basestation. In multi-connectivity, a configured set of serving cells for awireless device may comprise two subsets: an MCG comprising servingcells of a master base station, and SCGs comprising serving cells of asecondary base station. For an SCG, one or more of followingconfigurations may be used. At least one cell of an SCG may have aconfigured UL CC and at least one cell of a SCG, named as primarysecondary cell (e.g., PSCell, PCell of SCG, PCell), and may beconfigured with PUCCH resources. If an SCG is configured, there may beat least one SCG bearer or one split bearer. After or upon detection ofa physical layer problem or a random access problem on a PSCell, or anumber of NR RLC retransmissions has been reached associated with theSCG, or after or upon detection of an access problem on a PSCellassociated with (e.g., during) a SCG addition or an SCG change: an RRCconnection re-establishment procedure may not be triggered, ULtransmissions towards cells of an SCG may be stopped, a master basestation may be informed by a wireless device of a SCG failure type, a DLdata transfer over a master base station may be maintained (e.g., for asplit bearer). An NR RLC acknowledged mode (AM) bearer may be configuredfor a split bearer. A PCell and/or a PSCell may not be de-activated. APSCell may be changed with a SCG change procedure (e.g., with securitykey change and a RACH procedure). A bearer type change between a splitbearer and a SCG bearer, and/or simultaneous configuration of a SCG anda split bearer, may or may not be supported.

With respect to interactions between a master base station and asecondary base stations for multi-connectivity, one or more of thefollowing may be used. A master base station and/or a secondary basestation may maintain RRM measurement configurations of a wirelessdevice. A master base station may determine (e.g., based on receivedmeasurement reports, traffic conditions, and/or bearer types) to requesta secondary base station to provide additional resources (e.g., servingcells) for a wireless device. After or upon receiving a request from amaster base station, a secondary base station may create and/or modify acontainer that may result in a configuration of additional serving cellsfor a wireless device (or decide that the secondary base station has noresource available to do so). For a wireless device capabilitycoordination, a master base station may provide (e.g., all or a part of)an AS configuration and wireless device capabilities to a secondary basestation. A master base station and a secondary base station may exchangeinformation about a wireless device configuration such as by using RRCcontainers (e.g., inter-node messages) carried via Xn messages. Asecondary base station may initiate a reconfiguration of the secondarybase station existing serving cells (e.g., PUCCH towards the secondarybase station). A secondary base station may decide which cell is aPSCell within a SCG. A master base station may or may not change contentof RRC configurations provided by a secondary base station. A masterbase station may provide recent (and/or the latest) measurement resultsfor SCG cell(s), for example, if an SCG addition and/or an SCG SCelladdition occurs. A master base station and secondary base stations mayreceive information of SFN and/or subframe offset of each other from anOAM and/or via an Xn interface (e.g., for a purpose of DRX alignmentand/or identification of a measurement gap). Dedicated RRC signaling maybe used for sending required system information of a cell as for CA, forexample, if adding a new SCG SCell, except for an SFN acquired from anMIB of a PSCell of a SCG.

FIG. 12 shows an example of a random access procedure. One or moreevents may trigger a random access procedure. For example, one or moreevents may be at least one of following: initial access from RRC_IDLE,RRC connection re-establishment procedure, handover, DL or UL dataarrival in (e.g., during) a state of RRC_CONNECTED (e.g., if ULsynchronization status is non-synchronized), transition fromRRC_Inactive, and/or request for other system information. A PDCCHorder, a MAC entity, and/or a beam failure indication may initiate arandom access procedure.

A random access procedure may comprise or be one of at least acontention based random access procedure and/or a contention free randomaccess procedure. A contention based random access procedure maycomprise one or more Msg 1 1220 transmissions, one or more Msg2 1230transmissions, one or more Msg3 1240 transmissions, and contentionresolution 1250. A contention free random access procedure may compriseone or more Msg 1 1220 transmissions and one or more Msg2 1230transmissions. One or more of Msg 1 1220, Msg 2 1230, Msg 3 1240, and/orcontention resolution 1250 may be transmitted in the same step. Atwo-step random access procedure, for example, may comprise a firsttransmission (e.g., Msg A) and a second transmission (e.g., Msg B). Thefirst transmission (e.g., Msg A) may comprise transmitting, by awireless device (e.g., wireless device 110) to a base station (e.g.,base station 120), one or more messages indicating an equivalent and/orsimilar contents of Msg1 1220 and Msg3 1240 of a four-step random accessprocedure. The second transmission (e.g., Msg B) may comprisetransmitting, by the base station (e.g., base station 120) to a wirelessdevice (e.g., wireless device 110) after or in response to the firstmessage, one or more messages indicating an equivalent and/or similarcontent of Msg2 1230 and contention resolution 1250 of a four-steprandom access procedure.

A base station may send (e.g., transmit, unicast, multicast, broadcast,etc.), to a wireless device, a RACH configuration 1210 via one or morebeams. The RACH configuration 1210 may comprise one or more parametersindicating at least one of following: an available set of PRACHresources for a transmission of a random access preamble, initialpreamble power (e.g., random access preamble initial received targetpower), an RSRP threshold for a selection of a SS block andcorresponding PRACH resource, a power-ramping factor (e.g., randomaccess preamble power ramping step), a random access preamble index, amaximum number of preamble transmissions, preamble group A and group B,a threshold (e.g., message size) to determine the groups of randomaccess preambles, a set of one or more random access preambles for asystem information request and corresponding PRACH resource(s) (e.g., ifany), a set of one or more random access preambles for a beam failurerecovery request and corresponding PRACH resource(s) (e.g., if any), atime window to monitor RA response(s), a time window to monitorresponse(s) on a beam failure recovery request, and/or a contentionresolution timer.

The Msg 1 1220 may comprise one or more transmissions of a random accesspreamble. For a contention based random access procedure, a wirelessdevice may select an SS block with an RSRP above the RSRP threshold. Ifrandom access preambles group B exists, a wireless device may select oneor more random access preambles from a group A or a group B, forexample, depending on a potential Msg3 1240 size. If a random accesspreambles group B does not exist, a wireless device may select the oneor more random access preambles from a group A. A wireless device mayselect a random access preamble index randomly (e.g., with equalprobability or a normal distribution) from one or more random accesspreambles associated with a selected group. If a base stationsemi-statically configures a wireless device with an association betweenrandom access preambles and SS blocks, the wireless device may select arandom access preamble index randomly with equal probability from one ormore random access preambles associated with a selected SS block and aselected group.

A wireless device may initiate a contention free random accessprocedure, for example, based on a beam failure indication from a lowerlayer. A base station may semi-statically configure a wireless devicewith one or more contention free PRACH resources for a beam failurerecovery request associated with at least one of SS blocks and/orCSI-RSs. A wireless device may select a random access preamble indexcorresponding to a selected SS block or a CSI-RS from a set of one ormore random access preambles for a beam failure recovery request, forexample, if at least one of the SS blocks with an RSRP above a firstRSRP threshold amongst associated SS blocks is available, and/or if atleast one of CSI-RSs with a RSRP above a second RSRP threshold amongstassociated CSI-RSs is available.

A wireless device may receive, from a base station, a random accesspreamble index via PDCCH or RRC for a contention free random accessprocedure. The wireless device may select a random access preambleindex, for example, if a base station does not configure a wirelessdevice with at least one contention free PRACH resource associated withSS blocks or CSI-RS. The wireless device may select the at least one SSblock and/or select a random access preamble corresponding to the atleast one SS block, for example, if a base station configures thewireless device with one or more contention free PRACH resourcesassociated with SS blocks and/or if at least one SS block with a RSRPabove a first RSRP threshold amongst associated SS blocks is available.The wireless device may select the at least one CSI-RS and/or select arandom access preamble corresponding to the at least one CSI-RS, forexample, if a base station configures a wireless device with one or morecontention free PRACH resources associated with CSI-RSs and/or if atleast one CSI-RS with a RSRP above a second RSPR threshold amongst theassociated CSI-RSs is available.

A wireless device may perform one or more Msg1 1220 transmissions, forexample, by sending (e.g., transmitting) the selected random accesspreamble. The wireless device may determine a PRACH occasion from one ormore PRACH occasions corresponding to a selected SS block, for example,if the wireless device selects an SS block and is configured with anassociation between one or more PRACH occasions and/or one or more SSblocks. The wireless device may determine a PRACH occasion from one ormore PRACH occasions corresponding to a selected CSI-RS, for example, ifthe wireless device selects a CSI-RS and is configured with anassociation between one or more PRACH occasions and one or more CSI-RSs.The wireless device may send (e.g., transmit), to a base station, aselected random access preamble via a selected PRACH occasions. Thewireless device may determine a transmit power for a transmission of aselected random access preamble at least based on an initial preamblepower and a power-ramping factor. The wireless device may determine anRA-RNTI associated with a selected PRACH occasion in which a selectedrandom access preamble is sent (e.g., transmitted). The wireless devicemay not determine an RA-RNTI for a beam failure recovery request. Thewireless device may determine an RA-RNTI at least based on an index of afirst OFDM symbol, an index of a first slot of a selected PRACHoccasions, and/or an uplink carrier index for a transmission of Msg11220.

A wireless device may receive, from a base station, a random accessresponse, Msg 2 1230. The wireless device may start a time window (e.g.,ra-ResponseWindow) to monitor a random access response. For a beamfailure recovery procedure, the base station may configure the wirelessdevice with a different time window (e.g., bfr-ResponseWindow) tomonitor response to on a beam failure recovery request. The wirelessdevice may start a time window (e.g., ra-ResponseWindow orbfr-ResponseWindow) at a start of a first PDCCH occasion, for example,after a fixed duration of one or more symbols from an end of a preambletransmission. If the wireless device sends (e.g., transmits) multiplepreambles, the wireless device may start a time window at a start of afirst PDCCH occasion after a fixed duration of one or more symbols froman end of a first preamble transmission. The wireless device may monitora PDCCH of a cell for at least one random access response identified bya RA-RNTI, or for at least one response to a beam failure recoveryrequest identified by a C-RNTI, at a time that a timer for a time windowis running.

A wireless device may determine that a reception of random accessresponse is successful, for example, if at least one random accessresponse comprises a random access preamble identifier corresponding toa random access preamble sent (e.g., transmitted) by the wirelessdevice. The wireless device may determine that the contention freerandom access procedure is successfully completed, for example, if areception of a random access response is successful. The wireless devicemay determine that a contention free random access procedure issuccessfully complete, for example, if a contention-free random accessprocedure is triggered for a beam failure recovery request and if aPDCCH transmission is addressed to a C-RNTI. The wireless device maydetermine that the random access procedure is successfully completed,and may indicate a reception of an acknowledgement for a systeminformation request to upper layers, for example, if at least one randomaccess response comprises a random access preamble identifier. Thewireless device may stop sending (e.g., transmitting) remainingpreambles (if any) after or in response to a successful reception of acorresponding random access response, for example, if the wirelessdevice has signaled multiple preamble transmissions.

The wireless device may perform one or more Msg 3 1240 transmissions,for example, after or in response to a successful reception of randomaccess response (e.g., for a contention based random access procedure).The wireless device may adjust an uplink transmission timing, forexample, based on a timing advanced command indicated by a random accessresponse. The wireless device may send (e.g., transmit) one or moretransport blocks, for example, based on an uplink grant indicated by arandom access response. Subcarrier spacing for PUSCH transmission forMsg3 1240 may be provided by at least one higher layer (e.g., RRC)parameter. The wireless device may send (e.g., transmit) a random accesspreamble via a PRACH, and Msg3 1240 via PUSCH, on the same cell. A basestation may indicate an UL BWP for a PUSCH transmission of Msg3 1240 viasystem information block. The wireless device may use HARQ for aretransmission of Msg 3 1240.

Multiple wireless devices may perform Msg 1 1220, for example, bysending (e.g., transmitting) the same preamble to a base station. Themultiple wireless devices may receive, from the base station, the samerandom access response comprising an identity (e.g., TC-RNTI).Contention resolution (e.g., comprising the wireless device 110receiving contention resolution 1250) may be used to increase thelikelihood that a wireless device does not incorrectly use an identityof another wireless device. The contention resolution 1250 may be basedon, for example, a C-RNTI on a PDCCH, and/or a wireless devicecontention resolution identity on a DL-SCH. If a base station assigns aC-RNTI to a wireless device, the wireless device may perform contentionresolution (e.g., comprising receiving contention resolution 1250), forexample, based on a reception of a PDCCH transmission that is addressedto the C-RNTI. The wireless device may determine that contentionresolution is successful, and/or that a random access procedure issuccessfully completed, for example, after or in response to detecting aC-RNTI on a PDCCH. If a wireless device has no valid C-RNTI, acontention resolution may be addressed by using a TC-RNTI. If a MAC PDUis successfully decoded and a MAC PDU comprises a wireless devicecontention resolution identity MAC CE that matches or otherwisecorresponds with the CCCH SDU sent (e.g., transmitted) in Msg3 1250, thewireless device may determine that the contention resolution (e.g.,comprising contention resolution 1250) is successful and/or the wirelessdevice may determine that the random access procedure is successfullycompleted.

FIG. 13 shows an example structure for MAC entities. A wireless devicemay be configured to operate in a multi-connectivity mode. A wirelessdevice in RRC_CONNECTED with multiple Rx/Tx may be configured to utilizeradio resources provided by multiple schedulers that may be located in aplurality of base stations. The plurality of base stations may beconnected via a non-ideal or ideal backhaul over the Xn interface. Abase station in a plurality of base stations may act as a master basestation or as a secondary base station. A wireless device may beconnected to and/or in communication with, for example, one master basestation and one or more secondary base stations. A wireless device maybe configured with multiple MAC entities, for example, one MAC entityfor a master base station, and one or more other MAC entities forsecondary base station(s). A configured set of serving cells for awireless device may comprise two subsets: an MCG comprising servingcells of a master base station, and one or more SCGs comprising servingcells of a secondary base station(s). FIG. 13 shows an example structurefor MAC entities in which a MCG and a SCG are configured for a wirelessdevice.

At least one cell in a SCG may have a configured UL CC. A cell of the atleast one cell may comprise a PSCell or a PCell of a SCG, or a PCell. APSCell may be configured with PUCCH resources. There may be at least oneSCG bearer, or one split bearer, for a SCG that is configured. After orupon detection of a physical layer problem or a random access problem ona PSCell, after or upon reaching a number of RLC retransmissionsassociated with the SCG, and/or after or upon detection of an accessproblem on a PSCell associated with (e.g., during) a SCG addition or aSCG change: an RRC connection re-establishment procedure may not betriggered, UL transmissions towards cells of a SCG may be stopped,and/or a master base station may be informed by a wireless device of aSCG failure type and DL data transfer over a master base station may bemaintained.

A MAC sublayer may provide services such as data transfer and radioresource allocation to upper layers (e.g., 1310 or 1320). A MAC sublayermay comprise a plurality of MAC entities (e.g., 1350 and 1360). A MACsublayer may provide data transfer services on logical channels. Toaccommodate different kinds of data transfer services, multiple types oflogical channels may be defined. A logical channel may support transferof a particular type of information. A logical channel type may bedefined by what type of information (e.g., control or data) istransferred. BCCH, PCCH, CCCH and/or DCCH may be control channels, andDTCH may be a traffic channel. A first MAC entity (e.g., 1310) mayprovide services on PCCH, BCCH, CCCH, DCCH, DTCH, and/or MAC controlelements. A second MAC entity (e.g., 1320) may provide services on BCCH,DCCH, DTCH, and/or MAC control elements.

A MAC sublayer may expect from a physical layer (e.g., 1330 or 1340)services such as data transfer services, signaling of HARQ feedback,and/or signaling of scheduling request or measurements (e.g., CQI). Indual connectivity, two MAC entities may be configured for a wirelessdevice: one for a MCG and one for a SCG. A MAC entity of a wirelessdevice may handle a plurality of transport channels. A first MAC entitymay handle first transport channels comprising a PCCH of a MCG, a firstBCH of the MCG, one or more first DL-SCHs of the MCG, one or more firstUL-SCHs of the MCG, and/or one or more first RACHs of the MCG. A secondMAC entity may handle second transport channels comprising a second BCHof a SCG, one or more second DL-SCHs of the SCG, one or more secondUL-SCHs of the SCG, and/or one or more second RACHs of the SCG.

If a MAC entity is configured with one or more SCells, there may bemultiple DL-SCHs, multiple UL-SCHs, and/or multiple RACHs per MACentity. There may be one DL-SCH and/or one UL-SCH on an SpCell. Theremay be one DL-SCH, zero or one UL-SCH, and/or zero or one RACH for anSCell. A DL-SCH may support receptions using different numerologiesand/or TTI duration within a MAC entity. A UL-SCH may supporttransmissions using different numerologies and/or TTI duration withinthe MAC entity.

A MAC sublayer may support different functions. The MAC sublayer maycontrol these functions with a control (e.g., Control 1355 and/orControl 1365) element. Functions performed by a MAC entity may compriseone or more of: mapping between logical channels and transport channels(e.g., in uplink or downlink), multiplexing (e.g., (De-) Multiplexing1352 and/or (De-) Multiplexing 1362) of MAC SDUs from one or differentlogical channels onto transport blocks (TBs) to be delivered to thephysical layer on transport channels (e.g., in uplink), demultiplexing(e.g., (De-) Multiplexing 1352 and/or (De-) Multiplexing 1362) of MACSDUs to one or different logical channels from transport blocks (TBs)delivered from the physical layer on transport channels (e.g., indownlink), scheduling information reporting (e.g., in uplink), errorcorrection through HARQ in uplink and/or downlink (e.g., 1363), andlogical channel prioritization in uplink (e.g., Logical ChannelPrioritization 1351 and/or Logical Channel Prioritization 1361). A MACentity may handle a random access process (e.g., Random Access Control1354 and/or Random Access Control 1364).

FIG. 14 shows an example of a RAN architecture comprising one or morebase stations. A protocol stack (e.g., RRC, SDAP, PDCP, RLC, MAC, and/orPHY) may be supported at a node. A base station (e.g., gNB 120A and/or120B) may comprise a base station central unit (CU) (e.g., gNB-CU 1420Aor 1420B) and at least one base station distributed unit (DU) (e.g.,gNB-DU 1430A, 1430B, 1430C, and/or 1430D), for example, if a functionalsplit is configured. Upper protocol layers of a base station may belocated in a base station CU, and lower layers of the base station maybe located in the base station DUs. An F1 interface (e.g., CU-DUinterface) connecting a base station CU and base station DUs may be anideal or non-ideal backhaul. F1-C may provide a control plane connectionover an F1 interface, and F1-U may provide a user plane connection overthe F1 interface. An Xn interface may be configured between base stationCUs.

A base station CU may comprise an RRC function, an SDAP layer, and/or aPDCP layer. Base station DUs may comprise an RLC layer, a MAC layer,and/or a PHY layer. Various functional split options between a basestation CU and base station DUs may be possible, for example, bylocating different combinations of upper protocol layers (e.g., RANfunctions) in a base station CU and different combinations of lowerprotocol layers (e.g., RAN functions) in base station DUs. A functionalsplit may support flexibility to move protocol layers between a basestation CU and base station DUs, for example, depending on servicerequirements and/or network environments.

Functional split options may be configured per base station, per basestation CU, per base station DU, per wireless device, per bearer, perslice, and/or with other granularities. In a per base station CU split,a base station CU may have a fixed split option, and base station DUsmay be configured to match a split option of a base station CU. In a perbase station DU split, a base station DU may be configured with adifferent split option, and a base station CU may provide differentsplit options for different base station DUs. In a per wireless devicesplit, a base station (e.g., a base station CU and at least one basestation DUs) may provide different split options for different wirelessdevices. In a per bearer split, different split options may be utilizedfor different bearers. In a per slice splice, different split optionsmay be used for different slices.

FIG. 15 shows example RRC state transitions of a wireless device. Awireless device may be in at least one RRC state among an RRC connectedstate (e.g., RRC Connected 1530, RRC_Connected, etc.), an RRC idle state(e.g., RRC Idle 1510, RRC_Idle, etc.), and/or an RRC inactive state(e.g., RRC Inactive 1520, RRC_Inactive, etc.). In an RRC connectedstate, a wireless device may have at least one RRC connection with atleast one base station (e.g., gNB and/or eNB), which may have a contextof the wireless device (e.g., UE context). A wireless device context(e.g., UE context) may comprise at least one of an access stratumcontext, one or more radio link configuration parameters, bearer (e.g.,data radio bearer (DRB), signaling radio bearer (SRB), logical channel,QoS flow, PDU session, and/or the like) configuration information,security information, PHY/MAC/RLC/PDCP/SDAP layer configurationinformation, and/or the like configuration information for a wirelessdevice. In an RRC idle state, a wireless device may not have an RRCconnection with a base station, and a context of the wireless device maynot be stored in a base station. In an RRC inactive state, a wirelessdevice may not have an RRC connection with a base station. A context ofa wireless device may be stored in a base station, which may comprise ananchor base station (e.g., a last serving base station).

A wireless device may transition an RRC state (e.g., UE RRC state)between an RRC idle state and an RRC connected state in both ways (e.g.,connection release 1540 or connection establishment 1550; and/orconnection reestablishment) and/or between an RRC inactive state and anRRC connected state in both ways (e.g., connection inactivation 1570 orconnection resume 1580). A wireless device may transition its RRC statefrom an RRC inactive state to an RRC idle state (e.g., connectionrelease 1560).

An anchor base station may be a base station that may keep a context ofa wireless device (e.g., UE context) at least at (e.g., during) a timeperiod that the wireless device stays in a RAN notification area (RNA)of an anchor base station, and/or at (e.g., during) a time period thatthe wireless device stays in an RRC inactive state. An anchor basestation may comprise a base station that a wireless device in an RRCinactive state was most recently connected to in a latest RRC connectedstate, and/or a base station in which a wireless device most recentlyperformed an RNA update procedure. An RNA may comprise one or more cellsoperated by one or more base stations. A base station may belong to oneor more RNAs. A cell may belong to one or more RNAs.

A wireless device may transition, in a base station, an RRC state (e.g.,UE RRC state) from an RRC connected state to an RRC inactive state. Thewireless device may receive RNA information from the base station. RNAinformation may comprise at least one of an RNA identifier, one or morecell identifiers of one or more cells of an RNA, a base stationidentifier, an IP address of the base station, an AS context identifierof the wireless device, a resume identifier, and/or the like.

An anchor base station may broadcast a message (e.g., RAN pagingmessage) to base stations of an RNA to reach to a wireless device in anRRC inactive state. The base stations receiving the message from theanchor base station may broadcast and/or multicast another message(e.g., paging message) to wireless devices in their coverage area, cellcoverage area, and/or beam coverage area associated with the RNA via anair interface.

A wireless device may perform an RNA update (RNAU) procedure, forexample, if the wireless device is in an RRC inactive state and movesinto a new RNA. The RNAU procedure may comprise a random accessprocedure by the wireless device and/or a context retrieve procedure(e.g., UE context retrieve). A context retrieve procedure may comprise:receiving, by a base station from a wireless device, a random accesspreamble; and requesting and/or receiving (e.g., fetching), by a basestation, a context of the wireless device (e.g., UE context) from an oldanchor base station. The requesting and/or receiving (e.g., fetching)may comprise: sending a retrieve context request message (e.g., UEcontext request message) comprising a resume identifier to the oldanchor base station and receiving a retrieve context response messagecomprising the context of the wireless device from the old anchor basestation.

A wireless device in an RRC inactive state may select a cell to camp onbased on at least a measurement result for one or more cells, a cell inwhich a wireless device may monitor an RNA paging message, and/or a corenetwork paging message from a base station. A wireless device in an RRCinactive state may select a cell to perform a random access procedure toresume an RRC connection and/or to send (e.g., transmit) one or morepackets to a base station (e.g., to a network). The wireless device mayinitiate a random access procedure to perform an RNA update procedure,for example, if a cell selected belongs to a different RNA from an RNAfor the wireless device in an RRC inactive state. The wireless devicemay initiate a random access procedure to send (e.g., transmit) one ormore packets to a base station of a cell that the wireless deviceselects, for example, if the wireless device is in an RRC inactive stateand has one or more packets (e.g., in a buffer) to send (e.g., transmit)to a network. A random access procedure may be performed with twomessages (e.g., 2-stage or 2-step random access) and/or four messages(e.g., 4-stage or 4-step random access) between the wireless device andthe base station.

A base station receiving one or more uplink packets from a wirelessdevice in an RRC inactive state may request and/or receive (e.g., fetch)a context of a wireless device (e.g., UE context), for example, bysending (e.g., transmitting) a retrieve context request message for thewireless device to an anchor base station of the wireless device basedon at least one of an AS context identifier, an RNA identifier, a basestation identifier, a resume identifier, and/or a cell identifierreceived from the wireless device. A base station may send (e.g.,transmit) a path switch request for a wireless device to a core networkentity (e.g., AMF, MME, and/or the like), for example, after or inresponse to requesting and/or receiving (e.g., fetching) a context. Acore network entity may update a downlink tunnel endpoint identifier forone or more bearers established for the wireless device between a userplane core network entity (e.g., UPF, S-GW, and/or the like) and a RANnode (e.g., the base station), such as by changing a downlink tunnelendpoint identifier from an address of the anchor base station to anaddress of the base station).

A base station may communicate with a wireless device via a wirelessnetwork using one or more technologies, such as new radio technologies(e.g., NR, 5G, etc.). The one or more radio technologies may comprise atleast one of: multiple technologies related to physical layer; multipletechnologies related to medium access control layer; and/or multipletechnologies related to radio resource control layer Enhancing the oneor more radio technologies may improve performance of a wirelessnetwork. System throughput, and/or data rate of transmission, may beincreased. Battery consumption of a wireless device may be reduced.Latency of data transmission between a base station and a wirelessdevice may be improved. Network coverage of a wireless network may beimproved. Transmission efficiency of a wireless network may be improved.

A base station may send (e.g., transmit) DCI via a PDCCH for at leastone of: a scheduling assignment and/or grant; a slot formatnotification; a preemption indication; and/or a power-control command.The DCI may comprise at least one of: an identifier of a DCI format; adownlink scheduling assignment(s); an uplink scheduling grant(s); a slotformat indicator; a preemption indication; a power-control forPUCCH/PUSCH; and/or a power-control for SRS.

A downlink scheduling assignment DCI may comprise parameters indicatingat least one of: an identifier of a DCI format; a PDSCH resourceindication; a transport format; HARQ information; control informationrelated to multiple antenna schemes; and/or a command for power controlof the PUCCH. An uplink scheduling grant DCI may comprise parametersindicating at least one of: an identifier of a DCI format; a PUSCHresource indication; a transport format; HARQ related information;and/or a power control command of the PUSCH.

Different types of control information may correspond to different DCImessage sizes. Supporting multiple beams, spatial multiplexing in thespatial domain, and/or noncontiguous allocation of RBs in the frequencydomain, may require a larger scheduling message, in comparison with anuplink grant allowing for frequency-contiguous allocation. DCI may becategorized into different DCI formats. A DCI format may correspond to acertain message size and/or usage.

A wireless device may monitor (e.g., in common search space or wirelessdevice-specific search space) one or more PDCCH for detecting one ormore DCI with one or more DCI format. A wireless device may monitor aPDCCH with a limited set of DCI formats, for example, which may reducepower consumption. The more DCI formats that are to be detected, themore power may be consumed by the wireless device.

The information in the DCI formats for downlink scheduling may compriseat least one of: an identifier of a DCI format; a carrier indicator; afrequency domain resource assignment; a time domain resource assignment;a time resource allocation; a bandwidth part indicator; a HARQ processnumber; one or more MCS; one or more NDI; one or more RV; MIMO relatedinformation; a downlink assignment index (DAI); PUCCH resourceindicator; PDSCH-to-HARQ feedback timing indicator; a TPC for PUCCH; anSRS request; and/or padding (e.g., if necessary). The MIMO relatedinformation may comprise at least one of: a PMI; precoding information;a transport block swap flag; a power offset between PDSCH and areference signal; a reference-signal scrambling sequence; a number oflayers; antenna ports for the transmission; and/or a transmissionconfiguration indication (TCI).

The information in the DCI formats used for uplink scheduling maycomprise at least one of: an identifier of a DCI format; a carrierindicator; a bandwidth part indication; a resource allocation type; afrequency domain resource assignment; a time domain resource assignment;a time resource allocation; an MCS; an NDI; a phase rotation of theuplink DM-RS; precoding information; a CSI request; an SRS request; anuplink index/DAI; a TPC for PUSCH; and/or padding (e.g., if necessary).

A base station may perform CRC scrambling for DCI, for example, beforetransmitting the DCI via a PDCCH. The base station may perform CRCscrambling by binary addition of multiple bits of at least one wirelessdevice identifier (e.g., C-RNTI, CS-RNTI, TPC-CS-RNTI, TPC-PUCCH-RNTI,TPC-PUSCH-RNTI, SP CSI C-RNTI, and/or TPC-SRS-RNTI) and the CRC bits ofthe DCI. The wireless device may check the CRC bits of the DCI, forexample, if detecting the DCI. The wireless device may receive the DCI,for example, if the CRC is scrambled by a sequence of bits that is thesame as the at least one wireless device identifier.

A base station may send (e.g., transmit) one or more PDCCH in differentCORESETs, for example, to support a wide bandwidth operation. A basestation may transmit one or more RRC messages comprising configurationparameters of one or more CORESETs. A CORESET may comprise at least oneof: a first OFDM symbol; a number of consecutive OFDM symbols; a set ofresource blocks; and/or a CCE-to-REG mapping. A base station may send(e.g., transmit) a PDCCH in a dedicated CORESET for particular purpose,for example, for beam failure recovery confirmation. A wireless devicemay monitor a PDCCH for detecting DCI in one or more configuredCORESETs, for example, to reduce the power consumption.

A base station may send (e.g., transmit) one or more MAC PDUs to awireless device. A MAC PDU may comprise a bit string that may be bytealigned (e.g., multiple of eight bits) in length. Bit strings may berepresented by tables in which the most significant bit is the leftmostbit of the first line of the table, and the least significant bit is therightmost bit on the last line of the table. The bit string may be readfrom the left to right, and then, in the reading order of the lines. Thebit order of a parameter field within a MAC PDU may be represented withthe first and most significant bit in the leftmost bit, and with thelast and least significant bit in the rightmost bit.

A MAC SDU may comprise a bit string that is byte aligned (e.g., multipleof eight bits) in length. A MAC SDU may be included in a MAC PDU, forexample, from the first bit onward. In an example, a MAC CE may be a bitstring that is byte aligned (e.g., multiple of eight bits) in length. AMAC subheader may be a bit string that is byte aligned (e.g., multipleof eight bits) in length. A MAC subheader may be placed immediately infront of the corresponding MAC SDU, MAC CE, and/or padding. A MAC entitymay ignore a value of reserved bits in a DL MAC PDU.

A MAC PDU may comprise one or more MAC subPDUs. A MAC subPDU of the oneor more MAC subPDUs may comprise at least one of: a MAC subheader only(e.g., including padding); a MAC subheader and a MAC SDU; a MACsubheader and a MAC CE; and/or a MAC subheader and padding. The MAC SDUmay be of variable size. A MAC subheader may correspond to a MAC SDU, aMAC CE, and/or padding.

A MAC subheader may comprise: an R field comprising one bit; an F fieldwith one bit in length; an LCID field with multiple bits in length; an Lfield with multiple bits in length, for example, if the MAC subheadercorresponds to a MAC SDU, a variable-sized MAC CE, and/or padding.

A MAC subheader may comprise an eight-bit L field. The LCID field mayhave six bits in length, and the L field may have eight bits in length.A MAC subheader may comprise a sixteen-bit L field. The LCID field maybe six bits in length, and the L field may be sixteen bits in length.

A MAC subheader may comprise: an R field with two bits in length; and anLCID field with multiple bits in length, when the MAC subheadercorresponds to a fixed sized MAC CE, or padding. The LCID field may havesix bits in length, and the R field may have two bits in length.

DL MAC PDU, multiple MAC CEs may be placed together. A MAC subPDUcomprising MAC CE may be placed before any MAC subPDU comprising a MACSDU, or a MAC subPDU comprising padding.

UL MAC PDU, multiple MAC CEs may be placed together. A MAC subPDUcomprising MAC CE may be placed after all MAC subPDU comprising a MACSDU. The MAC subPDU may be placed before a MAC subPDU comprisingpadding.

A MAC entity of a base station may send (e.g., transmit) to a MAC entityof a wireless device one or more MAC CEs. The one or more MAC CEs maycomprise at least one of: an SP ZP CSI-RS Resource SetActivation/Deactivation MAC CE; a PUCCH spatial relationActivation/Deactivation MAC CE; a SP SRS Activation/Deactivation MAC CE;a SP CSI reporting on PUCCH Activation/Deactivation MAC CE; a TCI StateIndication for UE-specific PDCCH MAC CE; a TCI State Indication forUE-specific PDSCH MAC CE; an Aperiodic CSI Trigger State SubselectionMAC CE; a SP CSI-RS/CSI-IM Resource Set Activation/Deactivation MAC CE;a wireless device (e.g., UE) contention resolution identity MAC CE; atiming advance command MAC CE; a DRX command MAC CE; a long DRX commandMAC CE; an SCell activation and/or deactivation MAC CE (e.g., 1 Octet);an SCell activation and/or deactivation MAC CE (e.g., 4 Octet); and/or aduplication activation and/or deactivation MAC CE. A MAC CE may comprisean LCID in the corresponding MAC subheader. Different MAC CEs may havedifferent LCID in the corresponding MAC subheader. An LCID with 111011in a MAC subheader may indicate a MAC CE associated with the MACsubheader is a long DRX command MAC CE.

The MAC entity of the wireless device may send (e.g., transmit), to theMAC entity of the base station, one or more MAC CEs. The one or more MACCEs may comprise at least one of: a short buffer status report (BSR) MACCE; a long BSR MAC CE; a C-RNTI MAC CE; a configured grant confirmationMAC CE; a single entry power headroom report (PHR) MAC CE; a multipleentry PHR MAC CE; a short truncated BSR; and/or a long truncated BSR. AMAC CE may comprise an LCID in the corresponding MAC subheader.Different MAC CEs may have different LCIDs in the corresponding MACsubheader. The LCID with 111011 in a MAC subheader may indicate a MAC CEassociated with the MAC subheader is a short-truncated command MAC CE.

Two or more component carriers (CCs) may be aggregated, for example, ina carrier aggregation (CA). A wireless device may simultaneously receiveand/or transmit on one or more CCs, for example, depending oncapabilities of the wireless device. The CA may be supported forcontiguous CCs. The CA may be supported for non-contiguous CCs.

A wireless device may have one RRC connection with a network, forexample, if configured with CA. At (e.g., during) an RRC connectionestablishment, re-establishment and/or handover, a cell providing a NASmobility information may be a serving cell. At (e.g., during) an RRCconnection re-establishment and/or handover procedure, a cell providinga security input may be a serving cell. The serving cell may be referredto as a PCell. A base station may send (e.g., transmit), to a wirelessdevice, one or more messages comprising configuration parameters of aplurality of one or more SCells, for example, depending on capabilitiesof the wireless device.

A base station and/or a wireless device may use an activation and/ordeactivation mechanism of an SCell for an efficient battery consumption,for example, if the base station and/or the wireless device isconfigured with CA. A base station may activate or deactivate at leastone of the one or more SCells, for example, if the wireless device isconfigured with one or more SCells. The SCell may be deactivated, forexample, after or upon configuration of an SCell.

A wireless device may activate and/or deactivate an SCell, for example,after or in response to receiving an SCell activation and/ordeactivation MAC CE. A base station may send (e.g., transmit), to awireless device, one or more messages comprising ansCellDeactivationTimer timer. The wireless device may deactivate anSCell, for example, after or in response to an expiry of thesCellDeactivationTimer timer.

A wireless device may activate an SCell, for example, if the wirelessdevice receives an SCell activation/deactivation MAC CE activating anSCell. The wireless device may perform operations (e.g., after or inresponse to the activating the SCell) that may comprise: SRStransmissions on the SCell; CQI, PMI, RI, and/or CRI reporting for theSCell on a PCell; PDCCH monitoring on the SCell; PDCCH monitoring forthe SCell on the PCell; and/or PUCCH transmissions on the SCell.

The wireless device may start and/or restart a timer (e.g., ansCellDeactivationTimer timer) associated with the SCell, for example,after or in response to activating the SCell. The wireless device maystart the timer (e.g., sCellDeactivationTimer timer) in the slot, forexample, if the SCell activation/deactivation MAC CE has been received.The wireless device may initialize and/or re-initialize one or moresuspended configured uplink grants of a configured grant Type 1associated with the SCell according to a stored configuration, forexample, after or in response to activating the SCell. The wirelessdevice may trigger a PHR, for example, after or in response toactivating the SCell.

The wireless device may deactivate the activated SCell, for example, ifthe wireless device receives an SCell activation/deactivation MAC CEdeactivating an activated SCell. The wireless device may deactivate theactivated SCell, for example, if a timer (e.g., ansCellDeactivationTimer timer) associated with an activated SCellexpires. The wireless device may stop the timer (e.g.,sCellDeactivationTimer timer) associated with the activated SCell, forexample, after or in response to deactivating the activated SCell. Thewireless device may stop a BWP inactivity timer associated with theactivated SCell, for example, after or in response to deactivating theactivated SCell. The wireless device may deactivate any active BWPassociated with the activated SCell, for example, after or in responseto deactivating the activated SCell. The wireless device may clear oneor more configured downlink assignments and/or one or more configureduplink grant Type 2 associated with the activated SCell, for example,after or in response to the deactivating the activated SCell. Thewireless device may suspend one or more configured uplink grant Type 1associated with the activated SCell, for example, after or in responseto deactivating the activated SCell. The wireless device may flush HARQbuffers associated with the activated SCell.

A wireless device may not perform certain operations, for example, if anSCell is deactivated. The wireless device may not perform one or more ofthe following operations if an SCell is deactivated: transmitting SRS onthe SCell; reporting CQI, PMI, RI, and/or CRI for the SCell on a PCell;transmitting on UL-SCH on the SCell; transmitting on a RACH on theSCell; monitoring at least one first PDCCH on the SCell; monitoring atleast one second PDCCH for the SCell on the PCell; and/or transmitting aPUCCH on the SCell.

A wireless device may restart a timer (e.g., an sCellDeactivationTimertimer) associated with the activated SCell, for example, if at least onefirst PDCCH on an activated SCell indicates an uplink grant or adownlink assignment. A wireless device may restart a timer (e.g., ansCellDeactivationTimer timer) associated with the activated SCell, forexample, if at least one second PDCCH on a serving cell (e.g. a PCell oran SCell configured with PUCCH, such as a PUCCH SCell) scheduling theactivated SCell indicates an uplink grant and/or a downlink assignmentfor the activated SCell. A wireless device may abort the ongoing randomaccess procedure on the SCell, for example, if an SCell is deactivatedand/or if there is an ongoing random access procedure on the SCell.

An SCell activation/deactivation MAC CE may comprise, for example, oneoctet. A first MAC PDU subheader comprising a first LCID may identifythe SCell activation/deactivation MAC CE of one octet. An SCellactivation/deactivation MAC CE of one octet may have a fixed size. TheSCell activation/deactivation MAC CE of one octet may comprise a singleoctet. The single octet may comprise a first number of C-fields (e.g.,seven) and a second number of R-fields (e.g., one).

An SCell Activation/Deactivation MAC CE may comprise, for example, anysize such as any quantity of octets (e.g., four octets). A second MACPDU subheader with a second LCID may identify the SCellActivation/Deactivation MAC CE of four octets. An SCellactivation/deactivation MAC CE of four octets may have a fixed size. TheSCell activation/deactivation MAC CE of four octets may comprise fouroctets. The four octets may comprise a third number of C-fields (e.g.,31) and a fourth number of R-fields (e.g., 1). A C_(i) field mayindicate an activation/deactivation status of an SCell with an SCellindex i, for example, if an SCell with SCell index i is configured. AnSCell with an SCell index i may be activated, for example, if the C_(i)field is set to one. An SCell with an SCell index i may be deactivated,for example, if the C_(i) field is set to zero. The wireless device mayignore the C_(i) field, for example, if there is no SCell configuredwith SCell index i. An R field may indicate a reserved bit. The R fieldmay be set to zero.

A base station may configure a wireless device with control information(e.g., TCI) associated with a downlink channel and/or an uplink channel.The control information may be used, for example, by the wireless deviceto receive data via the downlink channel. The control information may betransmited via a channel that may be different from the downlinkchannel.

A base station may configure a wireless device with a list of one ormore TCI state configurations (e.g., TCI-States) using and/or via ahigher layer parameter, for example, PDSCH-Config for a serving cell. Anumber (e.g., quantity, plurality, etc.) of the one or more TCI-Statesmay depend on a capability of the wireless device. The wireless devicemay use the one or more TCI-States to decode a PDSCH based on a detectedPDCCH with a DCI. The DCI may be intended, for example, for the wirelessdevice and/or the serving cell. Each of the one or more TCI-States statemay contain one or more parameters. The wireless device may use the oneor more parameters, for example, to configure a quasi-co-locationrelationship between one or more downlink reference signals (e.g., afirst DL RS and/or a second DL RS) and the DM-RS ports of the PDSCH. Thequasi-co-location relationship may be configured by a higher layerparameter QCL-Type1 for the first DL RS. The quasi-co-locationrelationship may be configured by a higher layer parameter QCL-Type2 forthe second DL RS, for example, if the second DL RS is configured.

A first QCL type of a first DL RS and a second QCL type of a second asecond DL RS may not be the same, for example, if the wireless deviceconfigures a quasi co-location relationship between the two DL RSs. Thefirst DL RS and the second DL RS may be the same. The first DL RS andthe second DL RS may be different.

A quasi co-location type (e.g., the first QCL type, the second QCL type)of a DL RS (e.g., the first DL RS, the second DL RS) may be provided tothe wireless device by a higher layer parameter (e.g., QCL-Type inQCL-Info). The higher layer parameter QCL-Type may be at least one of:QCL-TypeA: {Doppler shift, Doppler spread, average delay, delay spread},QCL-TypeB: {Doppler shift, Doppler spread}, QCL-TypeC: {average delay,Doppler shift} and QCL-TypeD: {Spatial Rx parameter}.

A wireless device may receive an activation command. The activationcommand may be used to map one or more TCI states (e.g., 8 states) toone or more codepoints of a TCI field in DCI. Mapping between one ormore TCI states and one or more codepoints of the TCI field in DCI maybe applied starting from slot n+3N_(slot) ^(subframe,μ)+1, for example,if a HARQ-ACK corresponding to a PDSCH carrying the activation commandis sent (e.g., transmitted) in slot n. The wireless device may determine(e.g., assume) that one or more DM-RS ports of a PDSCH of a serving cellare quasi-co-located with an SSB/PBCH block, for example, (i) before thewireless device receives the activation command and/or (ii) after thewireless device receives a higher layer configuration of TCI-States. TheSSB/PBCH block may be determined in an initial access procedure withrespect to one or more of QCL-TypeA′ and QCL-TypeD′, for example, ifapplicable.

A wireless device may be configured by a base station, with a higherlayer parameter TCI-PresentInDCI. The wireless device may determine(e.g., assume) that a TCI field is present in a DCI format (e.g., DCIformat 1_1) of a PDCCH transmitted on the CORESET, for example, if thehigher layer parameter TCI-PresentInDCI is set as ‘Enabled’ for aCORESET scheduling a PDSCH.

A base station and/or a wireless device may configure one or morewireless resources for communications between the base station and thewireless device. The wireless resources may comprise, for example, oneor more CORESETS. The base station may configure the one or moreCORESETS for the wireless device. The base station may (or may not)configure a CORESET with a higher layer parameter (e.g.,TCI-PresentlnDCI). The CORESET may schedule a PDSCH transmission. A timeoffset between a reception of DCI (e.g., DCI format 1_1, DCI format 1_0)in the CORESET and a corresponding PDSCH transmission may be equal to orgreater than a threshold (e.g., Threshold-Sched-Offset). The thresholdmay be based on a reported capability of the wireless device. Thewireless device may apply/associate a second TCI state for the CORESETused for/with a PDCCH transmission of the DCI. The wireless device mayapply/associate a second QCL assumption for/with the CORESET used for aPDCCH transmission of the DCI. The wireless device may perform a defaultPDSCH RS (reference signal) selection, for example, based on one or moreof: the base station not configuring the CORESET with a higher layerparameter (e.g., TCI-PresentlnDCI) and/or the time offset between thereception of the DCI and the PDSCH being equal or greater than thethreshold. The wireless device may determine/assume, in the defaultPDSCH RS selection and in order to determine antenna port quasico-location of the PDSCH, that a first TCI state or a first QCLassumption for the PDSCH is identical to (or substantially the same as)the second TCI state or the second QCL assumption applied for theCORESET.

A base station may configure a CORESET with a higher layer parameter(e.g., TCI-PresentInDCI). The higher layer parameter (e.g.,TCI-PresentInDCI) may be set as enabled (e.g., 1 or other value). TheCORESET may schedule a PDSCH with DCI (e.g., DCI format 1_0). The DCImay not comprise a TCI field. A time offset between a reception of theDCI in the CORESET and a corresponding PDSCH may be equal to or greaterthan a threshold (e.g., Threshold-Sched-Offset). The threshold may bebased on a reported capability of the wireless device. The wirelessdevice may apply/associate a second TCI state for the CORESET used for aPDCCH transmission of the DCI. The wireless device may apply/associate asecond QCL assumption for the CORESET used for a PDCCH transmission ofthe DCI. The wireless device may perform a default PDSCH RS selection,for example, based on one or more of: the base station scheduling thePDSCH with the DCI not comprising the TCI field and/or the time offsetbetween the reception of the DCI and the PDSCH transmission being equalor greater than the threshold. The wireless device may determine/assume,in the default PDSCH RS selection (e.g., to determine antenna port quasico-location of the PDSCH), that a first TCI state and/or a first QCLassumption for the PDSCH is identical to (or substantially the same as)the second TCI state and/or the second QCL assumption applied for theCORESET. As described herein, the terms “TCI state” and “QCL assumption”may be used interchangeably. “TCI state” and/or “QCL assumption” mayindicate a beam used for reception of data (e.g., reception of PDSCHdata).

A base station may configure a CORESET with a higher layer parameter(e.g., TCI-PresentInDCI). The higher layer parameter (e.g.,TCI-PresentInDCI) may be set as enabled (e.g., 1 or other value). Thewireless device may receive DCI in the CORESET of a scheduling componentcarrier. The DCI may comprise a TCI field. The TCI field in the DCI inthe scheduling component carrier may indicate one or more activated TCIstates (e.g., after receiving the activation command) in a scheduledcomponent carrier or in a DL BWP, for example, based on the higher layerparameter (e.g., TCI-PresentinDCI) being set as enabled (e.g., 1 orother value).

A base station may configure a CORESET with a higher layer parameter(e.g., TCI-PresentInDCI). The higher layer parameter (e.g.,TCI-PresentInDCI) may be set as enabled (e.g., 1 or other value). Thewireless device may receive DCI (e.g., DCI format 1_1) in the CORESET.The DCI may schedule a PDSCH of a wireless device. The DCI may comprisea TCI field. The value of the TCI field may indicate the TCI state. Atime offset between a reception of the DCI and the correspondingscheduled PDSCH may be equal to or greater than a threshold (e.g.,Threshold-Sched-Offset). The threshold may be based on a capability orreported capability of the wireless device. The wireless device may usea TCI state according to a value of the TCI field (e.g., in a detectedPDCCH with the DCI) to determine antenna port quasi co-location for thePDSCH. The wireless device may determine antenna port quasi co-locationfor the PDSCH, for example, based on one or more of: the TCI field beingpresent in the DCI scheduling the PDSCH, and/or a higher layer parameter(e.g., TCI-PresentinDCI) being set as enabled for the CORESET. Using theTCI state according to the value of the TCI field may comprise thewireless device determining/assuming that one or more DM-RS ports of thePDSCH of a serving cell are quasi co-located with one or more RS(s) inthe TCI state with respect to one or more QCL type parameter(s) given bythe TCI state, for example, if the time offset between the reception ofthe DCI and the PDSCH is equal or greater than the threshold.

A base station may configure a wireless device with a single slot PDSCH(e.g., and/or any other quantity of slot PDSCH). The single slot PDSCHmay be scheduled in a slot. The base station may activate one or moreTCI states in the slot. A TCI state (e.g., indicated by a TCI field inDCI scheduling the single slot PDSCH) may be based on the one or moreactivated TCI states in the slot with the scheduled single slot PDSCH.The TCI state may be one of the one or more activated TCI states in theslot. The TCI field in the DCI may indicate a TCI state of the one ormore activated TCI states in the slot.

A wireless device may be configured with a CORESET. The CORESET may beassociated with a search space set for cross-carrier scheduling. Thewireless device may determine/expect/assume that a higher layerparameter (e.g., TCI-PresentInDCI) is set as enabled for the CORESET,for example, based on the CORESET being associated with the search spaceset for cross-carrier scheduling. A base station may configure a servingcell with one or more TCI states. The wireless device may detect, in thesearch space set, a PDCCH (e.g., comprising DCI) for scheduling a PDSCH.A TCI field in the DCI may indicate at least one of the one or more TCIstates. The at least one of the one more TCI states (e.g., scheduled bythe search space set) may comprise a QCL type (e.g., QCL-TypeD). Thewireless device may determine/expect/assume that a time offset between areception of the PDCCH detected in the search space set and the PDSCH isgreater than or equal to a threshold (e.g., Threshold-Sched-Offset), forexample, based on at least one of the one or more TCI states scheduledby the search space set containing the QCL type.

A base station may configure a CORESET with a higher layer parameter(e.g., TCI-PresentInDCI). The higher layer parameter (e.g.,TCI-PresentInDCI) may be set as enabled. An offset between a receptionof DCI in the CORESET and a PDSCH scheduled by the DCI may be less thana threshold (e.g., Threshold-Sched-Offset), for example, if the higherlayer parameter (e.g., TCI-PresentInDCI) is set to be enabled for theCORESET.

A base station may or may not configure a CORESET with a higher layerparameter (e.g., TCI-PresentInDCI). The wireless device may be, forexample, in an RRC connected mode. The wireless device may be, forexample, in an RRC idle mode. The wireless device may be, for example,in an RRC inactive mode. An offset between a reception of DCI in theCORESET and a PDSCH scheduled by the DCI may be less than a threshold(e.g., Threshold-Sched-Offset), for example, if the higher layerparameter (e.g., TCI-PresentInDCI) is not configured for the CORESET.

A wireless device may monitor one or more CORESETs and/or one or moresearch spaces within/in an active BWP (e.g., an active downlink BWP) ofa serving cell in one or more slots (e.g., one or more time slots).Monitoring the one or more CORESETs within/in the active BWP of theserving cell in the one or more slots may comprise monitoring at leastone CORESET within/in the active BWP of the serving cell in each slot ofthe one or more slots. A latest slot of the one or more slots may be amost recent slot. The wireless device may monitor, within/in the activeBWP of the serving cell, one or more second CORESETs of the one or moreCORESETs in the latest slot. The wireless device may determine thelatest slot, for example, based on monitoring the one or more secondCORESETs in the latest slot. Each CORESET of the one or more secondCORESETs may be indicated/identified by a CORESET-specific index (e.g.,indicated by a higher layer parameter, such as CORESET-ID). A CORESETspecific index of a CORESET of the one or more second CORESETs may beleast among the CORESET specific indices of the one or more secondCORESETs. The wireless device may monitor a search space associated withthe CORESET (e.g., in the latest slot). The wireless device may selectthe CORESET of the one or more second CORESETs, for example, based onone or more of: the CORESET-specific index of the CORESET being theleast, and/or the monitoring the search space associated with theCORESET in the latest slot (or any other slot). The wireless device maydetermine/assume that one or more DM-RS ports of the PDSCH of theserving cell are quasi co-located with one or more RSs in a TCI statewith respect to one or more QCL type parameter(s), for example, if anoffset between the reception of the DCI in the CORESET and the PDSCHscheduled by the DCI is less than a threshold (e.g.,Threshold-Sched-Offset). The one or more RSs in the TCI state may beused for PDCCH quasi co-location indication of the CORESET of the one ormore second CORESETs, based on or in response to the selecting theCORESET.

A wireless device may receive DCI via a PDCCH in a CORESET. The DCI mayschedule a PDSCH. An offset between a reception of the DCI and the PDSCHmay be less than a threshold (e.g., Threshold-Sched-Offset). A first QCLtype (e.g., QCL-TypeD) of one or more DM-RS ports of the PDSCH may bedifferent from a second QCL type (e.g., QCL-TypeA) of one or more secondDM-RS ports of the PDCCH. The PDSCH and the PDCCH may overlap in atleast one symbol. The wireless device may prioritize a reception of thePDCCH associated with the CORESET, for example, based on one or more of:the PDSCH and the PDCCH overlapping in at least one symbol, and/or thefirst QCL type being different from the second QCL type. Theprioritizing may apply to an intra-band CA case, for example, if thePDSCH and the CORESET are in different component carriers. Theprioritizing the reception of the PDCCH may comprise receiving the PDSCHwith the second QCL type of one or more second DM-RS ports of the PDCCH.The prioritizing the reception of the PDCCH may comprise overwriting thefirst QCL type of the one or more DM-RS ports of the PDSCH with thesecond QCL type of the one or more second DM-RS ports of the PDCCH. Theprioritizing the reception of the PDCCH may comprise assuming a spatialQCL of the PDCCH (e.g., the second QCL type), for the simultaneousreception of the PDCCH and the PDSCH. The prioritizing the reception ofthe PDCCH may comprise applying a spatial QCL of the PDCCH (e.g., thesecond QCL type), for the simultaneous reception of the PDCCH and thePDSCH.

The configured TCI states may or may not comprise an indication of a QCLtype (e.g., none of the configured TCI states may comprise an indicationof a QCL typeD). The wireless device may determine assume QCLassumptions for the configured TCI states, for example, based onindicated TCI states for one or more scheduled PDSCH transmissions, forexample, if none of the configured TCI states comprise the indication ofthe QCL type (e.g., QCL TypeD). The wireless device may determine QCLassumptions for the configured TCI states, for example, irrespective ofthe time offset between the reception of the DCI and the correspondingPDSCH.

A wireless device may use a CSI-RS for at least one of: time/frequencytracking, CSI computation, L1-RSRP computation, and/or mobility. A basestation may configure a wireless device to monitor a CORESET on one ormore symbols (e.g., OFDM symbols). A CSI-RS resource may be associatedwith a resource set parameter (e.g., non-zero power CSI-RS resource set,NZP-CSI-RS-ResourceSet). A higher layer parameter repetition of theNZP-CSI-RS-ResourceSet may be set to ‘on’ or another indication/value(e.g., 1, enabled, etc.). The wireless device may not determine/expectto be configured with a CSI-RS of the CSI-RS resource over the one ormore symbols, for example, based on or in response to the CSI-RSresource being associated with the NZP-CSI-RS-ResourceSet with thehigher layer parameter repetition set to ‘on’ or anotherindication/value (e.g., 1, enabled, etc.).

A higher layer parameter repetition of the NZP-CSI-RS-ResourceSet maynot be set to ‘on’ or another indication/value (e.g., 1, enabled, etc.).A base station may configure a CSI-RS resource and/or one or more searchspace sets associated with a CORESET in the same (or different) one ormore symbols (e.g., OFDM symbols). The wireless device maydetermine/assume that a CSI-RS of the CSI-RS resource and one or moreDM-RS ports of a PDCCH are quasi co-located with QCL-TypeD, for example,based on one or more of: the higher layer parameter repetition of theNZP-CSI-RS-ResourceSet not being set to ‘on’ or another indication/value(e.g., 1, enabled, etc.), and/or the CSI-RS resource and the one or moresearch space sets associated with the CORESET being configured in thesame one or more symbols. The base station may send (e.g., transmit_thePDCCH in the one or more search space sets associated with the CORESET.

A higher layer parameter repetition of the NZP-CSI-RS-ResourceSet maynot be set to ‘on’ or another indication/value (e.g, may be set to 0,disabled, etc.). In A base station may configure a CSI-RS resource of afirst cell and one or more search space sets associated with a CORESETof a second cell in the same (or different) one or more symbols (e.g.,OFDM symbols). The wireless device may determine/assume that a CSI-RS ofthe CSI-RS resource and one or more DM-RS ports of a PDCCH are quasico-located with QCL-TypeD, for example, based on one or more of: thehigher layer parameter repetition of the NZP-CSI-RS-ResourceSet notbeing set to ‘on’ or another indication/value (e.g., 1, enabled, etc.),and/or the CSI-RS resource and the one or more search space setsassociated with the CORESET being configured in the same one or moresymbols. The base station may send (e.g., transmit) the PDCCH in the oneor more search space sets associated with the CORESET. The first celland the second cell may be in different intra-band component carriers.

A base station may configure a wireless device with a CSI-RS in a firstset of PRBs. The base station may configure the wireless device with oneor more search space sets associated with a CORESET in one or moresymbols (e.g., OFDM symbols) and/or in a second set of PRBs. Thewireless device may not determine/expect that the first set of PRBs andthe second set of PRBs overlap in the one or more symbols.

A base station may configure a wireless device with a CSI-RS resourceand an SS/PBCH block in the same (or different) one or more symbols(e.g., OFDM symbols). The wireless device may determine/assume that theCSI-RS resource and the SS/PBCH block are quasi co-located with a QCLtype (e.g., QCL-TypeD), for example, based on the CSI-RS resource andthe SS/PBCH block being configured in the same one or more symbols.

The base station may configure the CSI-RS resource in a first set ofPRBs for the wireless device. The base station may configure the SS/PBCHblock in a second set of PRBs for the wireless device. The wirelessdevice may not determine/expect that the first set of PRBs overlap withthe second set of PRBs.

The base station may configure the CSI-RS resource with a firstsubcarrier spacing for the wireless device. The base station mayconfigure the SS/PBCH block with a second subcarrier spacing for thewireless device. The wireless device may determine/expect that the firstsubcarrier spacing and the second subcarrier spacing are the same.

A base station may configure a wireless device with anNZP-CSI-RS-ResourceSet. The NZP-CSI-RS-ResourceSet may be configuredwith a higher layer parameter repetition set to ‘on’ or anotherindication/value (e.g., 1, enabled, etc.). The wireless device maydetermine/assume that the base station may send (e.g., transmit) one ormore CSI-RS resources within the NZP-CSI-RS-ResourceSet with a samedownlink spatial domain transmission filter, for example, based on theNZP-CSI-RS-ResourceSet being configured with the higher layer parameterrepetition set to ‘on’ or another indication/value (e.g., 1, enabled,etc.). The base station may send (e.g., transmit) each CSI-RS resourceof the one or more CSI-RS resources in different symbols (e.g., OFDMsymbols).

The NZP-CSI-RS-ResourceSet may be configured with a higher layerparameter repetition set to ‘off’ or another indication/value (e.g., 0,disabled, etc.). The wireless device may not determine/assume that thebase station may send (e.g., transmit) one or more CSI-RS resourceswithin the NZP-CSI-RS-ResourceSet with a same downlink spatial domaintransmission filter, for example, based on the NZP-CSI-RS-ResourceSetbeing configured with the higher layer parameter repetition set to ‘off’or another indication/value (e.g., 0, disabled, etc.).

A base station may configure a wireless device with a higher layerparameter (e.g., groupBasedBeamReporting). The base station may set thehigher layer parameter (e.g., groupBasedBeamReporting) to enabled oranother indication/value (e.g., 1, on, etc.). The wireless device mayreport at least two different resource indicators (e.g., CRI, SSBRI) ina single reporting instance to report setting of one or more reportsettings, for example, based on the higher layer parametergroupBasedBeamReporting being set to enabled or another indication/value(e.g., 1, on, etc.). The wireless device may receive at least two RSs(e.g., CSI-RS, SSB) indicated by the at least two different resourceindicators simultaneously. The wireless device may receive (e.g.,simultaneously receive) the at least two RSs with a single spatialdomain receive filter. The wireless device may receive (e.g.,simultaneously receive) the at least two RSs with a plurality ofsimultaneous spatial domain receive filters.

A base station may need/request radio access capability information of awireless device. The base station may initiate a procedure to requestthe radio access capability information. The base station may use, forexample, an information element (e.g., UECapabilityEnquiry). Thewireless device may use an information element (e.g.,UECapabilityInformation) to transfer wireless device radio accesscapability information requested by the base station. The wirelessdevice may send/provide, for example, a parameter (e.g.,timeDurationForQCL) in a messsage (e.g., FeatureSetDownlink) indicatinga set of features that the wireless device supports.

The wireless device may send/provide a threshold (e.g.,timeDurationForQCL, Threshold-Sched-Offset) in an indication/message(e.g., FeatureSetDownlink) that indicates a set of features that thewireless device supports. The threshold may comprise a quantity (e.g.,minimum quantity/number) of OFDM symbols required, by the wirelessdevice, to perform a PDCCH reception with DCI, and to apply a spatialQCL information (e.g., TCI-State) received in (or indicated by) the DCIfor processing a PDSCH that is scheduled by the DCI. The wireless devicemay require the quantity (e.g., minimum quantity/number) of OFDM symbolsbetween the PDCCH reception and the processing of the PDSCH to apply thespatial QCL information, indicated by the DCI, to the PDSCH.

A base station may transmit reference signals (e.g., SRSs). Thereference signals may be used, by a wireless device, for variouspurposes such as channel state estimation, uplink scheduling, downlinkscheduling, link adaptation, and/or the like. A base station mayconfigure a wireless device with one or more sounding reference signal(SRS) resource sets, for example, using a higher layer parameter (e.g.,SRS-ResourceSet). The base station may configure the wireless devicewith one or more SRS resources, for an SRS resource set of the one ormore SRS resource sets, for example, using a higher layer parameter(e.g., SRS-Resource). The wireless device may indicate a quantity (e.g.,maximum value of a quantity/number) of the one or more SRS resources tothe base station (e.g., using SRS_capability parameter). The basestation may configure an applicability of the SRS resource set, forexample, using a higher layer parameter (e.g., usage) in the higherlayer parameter (e.g., SRS-ResourceSet).

The wireless device may send (e.g., transmit), at a time duration or agiven time instant, one SRS resource of the one or more SRS resources ineach SRS resource set (e.g., simultaneously), for example, if a higherlayer parameter (e.g., usage) is set to a value/indication (e.g.,BeamManagement). The wireless device may determine that the one SRSresource of the one or more SRS resources in each SRS resource set mayhave the same time domain behavior in a same BWP (e.g., UL BWP). Thewireless device may send/transmit (e.g., simultaneously send/transmit)the one SRS resource of the one or more SRS resources in each SRSresource set in the same BWP, for example, based on the determining.

The wireless device may send (e.g., transmit,) at a time duration or agiven time instant, only one SRS resource in each of the one or more SRSresource sets (e.g., simultaneously), for example, if the higher layerparameter (e.g., usage) is set to a value/indication (e.g.,BeamManagement). The wireless device may determine that the only one SRSresource in each of the one or more SRS resource sets may have the sametime domain behavior in a same BWP (e.g., UL BWP). The wireless devicemay simultaneously transmit the only one SRS resource in each of the oneor more SRS resource sets in the same BWP, for example, based on thedetermining.

The wireless device may simultaneously transmit, at a given timeinstant, one SRS resource in each of one or more SRS resource sets, forexample, if the higher layer parameter (e.g., usage) is set to avalue/indication (e.g., BeamManagement). The wireless device maydetermine that the one SRS resource in each of the one or more SRSresource sets may have the same time domain behavior in a same BWP(e.g., UL BWP). The wireless device may simultaneously transmit the oneSRS resource in each of the one or more SRS resource sets in the sameBWP, for example, based on the determining.

The one or more SRS resource sets may comprise a first SRS resource setand a second SRS resource set. The first SRS resource set may compriseone or more first SRS resources. The one or more first SRS resources maycomprise a first SRS resource and a second SRS resource. The second SRSresource set may comprise one or more second SRS resources. The one ormore second SRS resources may comprise a third SRS resource and a fourthSRS resource.

A first time domain behavior of the first SRS resource and a third timedomain behavior of the third SRS resource may be the same in a BWPand/or other wireless resource. The wireless device may send/transmit(e.g., simultaneously send/transmit), in a time duration or at a giventime instant in the BWP, the first SRS resource of the first SRSresource set and the third SRS resource of the second SRS resource set,for example, based on a higher layer parameter (e.g., usage) being setto a value/indication (e.g., BeamManagement), and/or the first timedomain behavior of the first SRS resource and the third time domainbehavior of the third SRS resource being the same (or substantially thesame).

A first time domain behavior of the first SRS resource and a fourth timedomain behavior of the fourth SRS resource may be different in a BWPand/or other wireless resource. The wireless device may notsend/transmit (e.g., simultaneously send/transmit), in a time durationor a given time instant in the BWP and/or other wireless resource, thefirst SRS resource of the first SRS resource set and the fourth SRSresource of the second SRS resource set, for example, based on a higherlayer parameter (e.g., usage) being set to a value/indication (e.g.,BeamManagement), and/or based on the first time domain behavior of thefirst SRS resource and the fourth time domain behavior of the fourth SRSresource being different.

A second time domain behavior of the second SRS resource and a fourthtime domain behavior of the fourth SRS resource may be the same (orsubstantially the same) in a BWP and/or other wireless resource. Thewireless device may send/transmit (e.g., simultaneously send/transmit),in a time duration or a given time instant in the BWP or other wirelessresource, the second SRS resource of the first SRS resource set and thefourth SRS resource of the second SRS resource set, for example, basedon a higher layer parameter (e.g., usage) being set to avalue/indication (e.g., BeamManagement), and/or based on the second timedomain behavior of the second SRS resource and the fourth time domainbehavior of the fourth SRS resource being the same (or substantially thesame).

A second time domain behavior of the second SRS resource and a thirdtime domain behavior of the third SRS resource may be different in a BWPand/or other wireless resource. The wireless device may notsend/transmit (e.g., may not simultaneously send/transmit), in a timeduration or at a given time instant in the BWP or other wirelessresource, the second SRS resource of the first SRS resource set and thethird SRS resource of the second SRS resource set, for example, based ona higher layer parameter (e.g., usage) being set to a value/indication(e.g., BeamManagement), and/or based on the second time domain behaviorof the second SRS resource and the third time domain behavior of thethird SRS resource being different.

A wireless device (e.g., a higher layer parameter of the wireless devicesuch asSRS-Resource) may configure, semi-statically, at least one of: anSRS resource indicator/index (e.g., indicated/provided by a higher layerparameter srs-ResourceId) indicating a configuration of an SRS resource;a time domain behavior of the configuration of the SRS resource (e.g.,indicated by a higher layer parameter resourceType); an SRS sequenceindicator/ID (e.g., indicated/provided by a higher layer parametersequenceId); and/or a configuration of a spatial relation between areference RS and a target SRS. The base station may configure thewireless device with a higher layer parameter (e.g.,spatialRelationInfo). The higher layer parameter (e.g.,spatialRelationInfo) may comprise an indicator (e.g., an index or an ID)of the reference RS. The domain behavior of an SRS resource may be aperiodic transmission, a semi-persistent transmission, or an aperiodicSRS transmission. A time domain behavior of an SRS resource may comprisea transmission periodicity, a transmission offset of the SRS resource,and/or any other information/characteristic.

The wireless device may determine that a higher layer parameterindicating a serving cell (e.g., servingCellId) may be present inanother higher layer parameter (e.g., spatialRelationInfo). The wirelessdevice may determine that the reference RS may be a first RS (e.g.,SS/PBCH block, CSI-RS) configured on the serving cell, for example,based on the determining.

The wireless device may determine that a higher layer parameterindicating an UL BWP (e.g., uplinkBWP) and a higher layer parameterindicating a serving cell (e.g., servingCellId) may be present inanother higher layer parameter (e.g., spatialRelationInfo). The wirelessdevice may determine that the reference RS may be a first RS (e.g., SRS)configured on the UL BWP of the serving cell, for example, based on thedetermining.

The base station may configure the target SRS on a serving cell. Thewireless device may determine that a higher layer parameter (e.g.,servingCellId) may be absent from another higher layer parameter (e.g.,spatialRelationInfo). The wireless device may determine that thereference RS may be a first RS (e.g., SS/PBCH block, CSI-RS) configuredon the serving cell, for example, based on the determining.

The base station may configure the target SRS on a serving cell. Thewireless device may determine that a higher layer parameter (e.g.,servingCellId) is absent and a higher layer parameter (e.g., uplinkBWP)indicating an UL BWP (or other wireless resource) is present in anotherhigher layer parameter (e.g., spatialRelationInfo). The wireless devicemay determine that the reference RS may be a first RS (e.g., SRS)configured on the uplink BWP the serving cell, for example, based on thedetermining.

The wireless device may send (e.g., transmit) a PUSCH transmission andan SRS in a same slot. The base station may configure the wirelessdevice to send (e.g., transmit) the SRS after the transmission of thePUSCH (and the corresponding DM-RS), for example, if the wireless devicesends (e.g., transmits) the PUSCH transmission and the SRS in the sameslot.

The base station may configure the wireless device with one or more SRSresource configurations. A higher layer parameter (e.g., resourceType)in a higher layer parameter (e.g., SRS-Resource) may be set to beperiodic.

The base station may configure the wireless device with a higher layerparameter (e.g., spatialRelationInfo). The higher layer parameter (e.g.,spatialRelationInfo) may comprise an indicator (e.g., an ID) of areference RS (e.g., ssb-Index, csi-RS-Index, SRS).

The reference RS may be a SS/PBCH block. The reference RS may be aCSI-RS (e.g., periodic CSI-RS, semi-persistent CSI-RS, aperiodicCSI-RS). The wireless device may use a spatial domain receiving filterto receive the reference RS. The wireless device may send (e.g.,transmit) a target SRS resource with a spatial domain transmissionfilter that may be the same as the spatial domain receiving filter, forexample, based on a higher layer parameter (e.g., spatialRelationInfo)indicating the reference RS (e.g., using an ID of the reference RS)being the SS/PBCH block or the CSI-RS. The wireless device may send(e.g., transmit) a target SRS resource with the spatial domain receivingfilter, for example, based on the higher layer parameter (e.g.,spatialRelationInfo) indicating the reference RS (e.g., by the ID of thereference RS).

The reference RS may be an SRS (e.g., periodic SRS, semi-persistent SRS,aperiodic SRS). The wireless device may use a spatial domaintransmission filter to send (e.g., transmit) the reference RS. Thewireless device may send (e.g., transmit) a target SRS resource with thespatial domain transmission filter, for example, based on the higherlayer parameter (e.g., spatialRelationInfo) indicating the reference RS(e.g., by the ID of the reference RS) being the SRS.

The base station may activate and/or deactivate one or more configuredSRS resource sets (e.g., semi-persistent SRS resource sets) of a servingcell by sending a semi-persistent (SP) SRS Activation/Deactivationcontrol element (e.g., MAC CE). The one or more configured SRS resourcesets may be initially deactivated upon configuration. The one or moreconfigured SRS resource sets may be deactivated after a handover.

A base station may configure a wireless device with one or more SRSresource sets (e.g., semi-persistent SRS resource sets). A higher layerparameter (e.g., resourceType) in a higher layer parameter (e.g.,SRS-Resource) may be set to be semi-persistent. The wireless device mayreceive, from the base station, an activation command (e.g., SP SRSActivation/Deactivation MAC CE) for an SRS resource set of the one ormore SRS resource sets. A PDSCH transmission may carry the activationcommand. The wireless device may send (e.g., transmit) an HARQ-ACK forthe PDSCH in a slot n. The wireless device may apply one or moreassumptions/actions for an SRS transmission of the SRS resource setstarting from the slot n+3N_(slot) ^(subframe,μ)+1 or from slotn+3N_(slot) ^(subframe,μ), for example, based on transmitting theHARQ-ACK for the PDSCH in the slot n. The activation command maycomprise one or more spatial relation assumptions for one or more SRSresources of the SRS resource set. A first field (e.g., Resource IDi) inthe activation command may comprise an indicator (e.g., identifier) of aresource (e.g., SS/PBCH block, NZP CSI-RS, SRS) that may be used forspatial relationship derivation for an SRS resource of the one or moreSRS resources. The one or more spatial relation assumptions may beindicated/provided by a list of references to one or more referencesignal indicators (e.g., IDs such as SSB-Index, SRS-ResourceId, etc).The activation command may comprise one reference signal indicator perSRS resource of the (activated) SRS resource set. A spatial relationassumption of the one or more spatial relation assumption may beindicated/provided by a reference to an indicator (e.g., ID) of areference RS. The reference RS may be at least one of: an SS/PBCH block,an NZP CSI-RS resource, and/or an SRS.

A Resource Serving Cell indicator (e.g., ID) field may be present in theactivation command. The Resource Serving Cell ID field may indicate aserving cell. The reference RS may be an SS/PBCH block resource or anNZP CSI-RS resource. The reference RS (e.g., SS/PBCH block, NZP CSI-RSresource) may be configured on the serving cell, for example, based onthe Resource Serving Cell ID field (or other field) being present andthe reference RS being the SS/PBCH block resource, the NZP CSI-RSresource, or other resource.

The base station may configure the SRS resource set (e.g., the activatedSRS resource set) on a serving cell. A Resource Serving Cell ID fieldmay be absent in the activation command. The reference RS (e.g., SS/PBCHblock, NZP CSI-RS resource) may be configured on the serving cell, forexample, based on the Resource Serving Cell ID field being absent and/orthe base station configuring the SRS resource set on the serving cell.

A Resource Serving Cell ID field indicating a serving cell, and/or aResource BWP ID field indicating an UL BWP may be present in theactivation command. The reference RS (e.g., SRS resource) may beconfigured on the UL BWP of the serving cell, for example, based on theResource Serving Cell ID field and/or the Resource BWP ID field beingpresent.

The base station may configure the SRS resource set on an UL BWP (orother wireless resource) of a serving cell. A Resource Serving Cell IDfield and/or a Resource BWP ID field may be absent in the activationcommand. The reference RS (e.g., SRS resource) may be configured on theUL BWP (or other wireless resource) of the serving cell, for example,based on the Resource Serving Cell ID field and/or the Resource BWP IDfield being absent, and/or based on the SRS resource set beingconfigured on the UL BWP of the serving cell.

The base station may configure an SRS resource in the SRS resource set(e.g., the activated SRS resource set) with a higher layer parameter(e.g., spatialRelationInfo). The wireless device may assume/determinethat a reference RS (e.g., indicated by an ID of the reference RS) inthe activation command overrides a second reference RS configured in thehigher layer parameter spatialRelationInfo, for example, based on theSRS resource, in the activated SRS resource set, being configured with ahigher layer parameter (e.g., spatialRelationInfo).

The wireless device may receive, from the base station, a deactivationcommand (e.g., SP SRS Activation/Deactivation MAC CE) for an SRSresource set (e.g., activated SRS resource set) of the one or more SRSresource sets. A PDSCH transmission may carry the deactivation command.The wireless device may send (e.g., transmit) an HARQ-ACK for the PDSCHtransmission in a slot n. IThe wireless device may apply one or moreassumptions/actions for a cessation of an SRS transmission of the SRSresource set (e.g., deactivated SRS resource set) starting from the slotn+3N_(slot) ^(subframe,μ)+1 or from slot n+3N_(slot) ^(subframe,μ), forexample, based on transmitting the HARQ-ACK for the PDSCH transmissionin the slot n.

A wireless device may activate a semi-persistent SRS resourceconfiguration on an UL BWP (or other wireless resource) of a servingcell, for example, based on or in response to receiving, from a basestation, an activation command for the semi-persistent SRS resourceconfiguration. The wireless device may not receive, from the basestation, a deactivation command for the semi-persistent SRS resourceconfiguration.

The UL BWP may be an active uplink BWP of the serving cell. The wirelessdevice may determine/consider that the semi-persistent SRS resourceconfiguration is active, for example, based on the UL BWP being theactive uplink BWP of the serving cell and/or based on not receiving thedeactivation command for the semi-persistent SRS resource configuration.The wireless device may send (e.g., transmit) an SRS transmission, viathe UL BWP of the serving cell, according to the semi-persistent SRSresource configuration, for example, based on considering/determiningthat the semi-persistent SRS resource configuration is active.

The UL BWP may not be an active uplink BWP of the serving cell. The ULBWP may be, for example, deactivated in the serving cell. In Thewireless device may determine/assume that the semi-persistent SRSconfiguration is suspended in the UL BWP of the serving cell, forexample, based on not receiving the deactivation command for thesemi-persistent SRS resource configuration and/or based on the UL BWPbeing deactivated. The semi-persistent SRS configuration being suspendedin the UL BWP may comprise that the wireless device may reactivate thesemi-persistent SRS configuration, for example, if the UL BWP becomes anactive UL BWP of the serving cell.

A first SRS resource of an SRS resource set may have a first time domainbehavior (e.g., periodic, semi-persistent, aperiodic). A second SRSresource of the SRS resource set may have a second time domain behavior(e.g., periodic, semi-persistent, aperiodic). The first time domainbehavior may be the same as, substantially the same as, or differentfrom, the second time domain behavior. The wireless device maydetermine/expect that the first time domain behavior and the second timebehavior are the same (or substantially the same), for example, based onthe first SRS resource and the second SRS resource being in the (same)SRS resource set. The wireless device may not determine/expect that thefirst time domain behavior and the second time behavior are different,for example, based on the first SRS resource and the second SRS resourcebeing in the (same) SRS resource set.

An SRS resource of an SRS resource set may have a first time domainbehavior (e.g., periodic, semi-persistent, aperiodic). The SRS resourceset may have a second time domain behavior (e.g., periodic,semi-persistent, aperiodic). The wireless device may determine/expectthat the first time domain behavior and the second time behavior are thesame (or substantially the same), for example, based on the SRS resourcebeing associated with the SRS resource set. The wireless device may notdetermine/expect that the first time domain behavior and the second timebehavior are different, for example, based on the SRS resource beingassociated with the SRS resource set. The SRS resource being associatedwith the SRS resource set may comprise that the SRS resource setcomprises the SRS resource. The SRS resource being associated with theSRS resource set may comprise that the SRS resource is an element of theSRS resource set.

A base station may configure a wireless device with a PUCCH transmissionon at least one first symbol on a carrier (e.g., SUL, NUL). The PUCCHtransmission may carry/comprise one or more CSI reports. The PUCCHtransmission may carry/comprise one or more L1-RSRP reports. The PUCCHtransmission may carry/comprise HARQ-ACK and/or SR. The base station mayconfigure the wireless device with an SRS configuration on the carrier.The SRS configuration may be a semi-persistent SRS configuration. TheSRS configuration may be a periodic SRS configuration. The wirelessdevice may determine that the PUCCH transmission and an SRS transmissionof the SRS configuration overlap in, for example, at least one symbol.The wireless device may determine that the at least one first symbol ofthe PUCCH transmission and at least one second symbol of the SRStransmission of the SRS configuration may overlap in the at least onesymbol. The wireless device may not perform the SRS transmission, on thecarrier and/or on the at least one symbol, for example, based on thedetermining

A base station may configure a wireless device with a PUCCH transmissionon at least one first symbol on a carrier (e.g., SUL, NUL). The PUCCHmay carry/comprise HARQ-ACK and/or SR. The base station may trigger anSRS configuration on the carrier. The SRS configuration may be anaperiodic SRS configuration. The wireless device may determine that thePUCCH transmission and an SRS transmission of the SRS configurationoverlap in at least one symbol. The wireless device may determine thatthe at least one first symbol of the PUCCH transmission and at least onesecond symbol of the SRS transmission of the SRS configuration mayoverlap in the at least one symbol. The wireless device may not performthe SRS transmission, on the carrier and on the at least one symbol, forexample, based on the determining.

The wireless device may drop the SRS transmission on the at least onesymbol, for example, if the wireless device does not perform the SRStransmission. The wireless device may perform the SRS transmission on atleast one third symbol of the at least one second symbol. The at leastone third symbol may not overlap with the at least one symbol.

A base station may configure a wireless device with a PUCCH transmissionon at least one first symbol on a carrier (e.g., SUL, NUL). The PUCCHtransmission may carry/comprise one or more semi-persistent CSI reports.The PUCCH transmission may carry/comprise one or more periodic CSIreports. The PUCCH transmission may carry/comprise one or moresemi-persistent L1-RSRP reports. The PUCCH transmission maycarry/comprise one or more periodic L1-RSRP reports. The base stationmay trigger an SRS configuration on the carrier. The SRS configurationmay be an aperiodic SRS configuration. The wireless device may determinethat the PUCCH transmission and an SRS transmission of the SRSconfiguration overlap in at least one symbol. The wireless device maydetermine that the at least one first symbol of the PUCCH transmissionand at least one second symbol of the SRS transmission of the SRSconfiguration being the aperiodic SRS configuration may overlap in theat least one symbol. IThe wireless device may not send (e.g., may nottransmit) the PUCCH transmission, on the carrier, on the at least onesymbol, for example, based on or in response to the determining.

A wireless device may not send/transmit (e.g., simultaneouslysend/transmit) an SRS and a PUCCH/PUSCH transmission, for example, in anintra-band CA or in an inter-band CA band-band combination. Abasestation may not configure the wireless device with an SRS transmissionfrom/in a first carrier and a PUCCH/PUSCH transmission (e.g., PUSCH/ULDM-RS/UL PT-RS/PUCCH formats) from/in a second carrier in the samesymbol, for example, based on not sending/transmitting the SRS and thePUCCH/PUSCH transmission simultaneously. The first carrier may bedifferent from (or the same as) the second carrier.

A wireless device may not send/transmit (e.g., may not simultaneouslysend/transmit) an SRS and a PRACH, for example, in an intra-band CAand/or in an inter-band CA band-band combination. InThe wireless devicemay not send/transmit an SRS from a first carrier, and a PRACHtransmission from a second carrier, simultaneously, for example based onor in response to not sending/transmitting the SRS and the PRACHtransmission simultaneously. The first carrier may be different from (orthe same as) the second carrier.

A base station may configure a wireless device with a periodic SRStransmission on at least one symbol (e.g., an OFDM symbol). The basestation may configure an SRS resource with a higher layer parameter(e.g., resourceType) set as aperiodic. The base station may trigger theSRS resource on the at least one symbol. The wireless device may send(e.g., transmit) the aperiodic SRS resource on the at least oneoverlapping symbol, for example, based on the SRS resource (e.g., withthe higher layer parameter resourceType set as aperiodic) beingtriggered on the at least one symbol that is configured with theperiodic SRS transmission. The wireless device may not perform theperiodic SRS transmission on the at least one symbol, for example, basedon the SRS resource (e.g., with the higher layer parameter resourceTypeset as aperiodic) being triggered on the at least one symbol configuredwith the periodic SRS transmission. The not performing the periodic SRStransmission may comprise that the wireless device may not send/transmitan SRS associated with the periodic SRS transmission on the at least oneoverlapping symbol.

A base station may configure a wireless device with a semi-persistentSRS transmission on at least one symbol (e.g., an OFDM symbol). The basestation may configure an SRS resource with a higher layer parameter(e.g., resourceType) set as ‘aperiodic’. The base station may triggerthe SRS resource on the at least one symbol. The wireless device maysend (e.g., transmit) the aperiodic SRS resource on the at least oneoverlapping symbol, for example, based the SRS resource (e.g., with thehigher layer parameter resourceType set as aperiodic) being triggered onthe at least one symbol that is configured with the semi-persistent SRStransmission. The wireless device may not perform the semi-persistentSRS transmission on the at least one symbol, for example, based the SRSresource (e.g., with the higher layer parameter resourceType set asaperiodic) being triggered on the at least one symbol that is configuredwith the semi-persistent SRS transmission. The not performing thesemi-persistent SRS transmission may comprise that the wireless devicemay not transmit an SRS associated with the semi-persistent SRStransmission on the at least one overlapping symbol.

A base station may configure a wireless device with a periodic SRStransmission on at least one symbol (e.g., an OFDM symbol). The basestation may configure an SRS resource with a higher layer parameter(e.g., resourceType) set as semi-persistent. The base station maytrigger the SRS resource on the at least one symbol. The wireless devicemay send (e.g., transmit) the semi-persistent SRS resource on the atleast one overlapping symbol, for example, based on the SRS resource(e.g., with the higher layer parameter resourceType set assemi-persistent) being triggered on the at least one symbol that isconfigured with the periodic SRS transmission. The wireless device maynot perform the periodic SRS transmission on the at least one symbol,for example, based on the SRS resource (e.g., with the higher layerparameter resourceType set as semi-persistent) being triggered on the atleast one symbol that is configured with the periodic SRS transmission.The not performing the periodic SRS transmission may comprise that thewireless device may not send (e.g., transmit) an SRS associated with theperiodic SRS transmission on the at least one overlapping symbol.

A wireless device may be configured, by a base station, with one or moreserving cells. The base station may activate one or more second servingcells of the one or more serving cells. The base station may configureeach activated serving cell, of the one or more second serving cells,with a respective PDCCH monitoring configuration. The wireless devicemay monitor a set of PDCCH candidates, in one or more CORESETs, on anactive DL BWP of each activated serving cell that is configured with therespective PDCCH monitoring configuration. The wireless device maymonitor the set of PDCCH candidates in the one or more CORESETs based onor according to corresponding search space sets. The monitoring maycomprise decoding each PDCCH candidate of the set of PDCCH candidatesaccording to monitored DCI formats.

A set of PDCCH candidates that are monitored by a wireless device may bedefined in terms of PDCCH search space sets. A search space set may be acommon search space (CSS) set or a wireless device-specific search spaceset (e.g., a UE-specific search space (USS) set).

One or more PDCCH monitoring occasions may be associated with a SS/PBCHblock. The SS/PBCH block may be quasi-co-located with a CSI-RS. A TCIstate of an active BWP may comprise the CSI-RS. The active BWP maycomprise a CORESET that is indicated (e.g., identified) by an index thatis equal to zero (e.g., CORESET zero). The wireless device may determinethe TCI state by one or more of (e.g., the most recent of): anindication by a MAC CE activation command, and/or an RA procedure thatis not initiated by a PDCCH order that triggers a non-contention basedRA procedure. A wireless device may monitor, for a DCI format with CRCsscrambled by a C-RNTI, corresponding PDCCH candidates at the one or morePDCCH monitoring occasions, for example, based on the one or more PDCCHmonitoring occasions being associated with the SS/PBCH block.

A base station may configure a wireless device with one or more DL BWPsin a serving cell. The wireless device may be indicated/provided, by ahigher layer signaling, with one or more (e.g., 2, 3, or any otherquantity of) CORESETs for a DL BWP of the one or more DL BWPs. The basestation may send/provide, a higher layer parameter (e.g.,ControlResourceSet) to the wireless device. The higher layer parametermay be for a CORESET of the one or more CORESETs, and/or mayindicate/provide at least one of: a CORESET index (e.g.,indicated/provided by higher layer parameter, controlResourceSetId), aDM-RS scrambling sequence initialization value (e.g., indicate/providedby a higher layer parameter, pdcch-DM-RS-ScramblingID), a quantity ofconsecutive symbols (e.g., indicated/provided by a higher layerparameter, duration), a set of resource blocks (e.g., indicated/providedby higher layer parameter, frequencyDomainResources), CCE-to-REG mappingparameters (e.g., indicated/provided by higher layer parameter,cce-REG-MappingType), an antenna port quasi co-location (e.g., from aset of antenna port quasi co-locations indicated/provided by a firsthigher layer parameter, tci-StatesPDCCH-ToAddList, and a second higherlayer parameter, tci-StatesPDCCH-ToReleaseList), and/or an indicationfor a presence or absence of a TCI field for a DCI format (e.g., DCIformat 1_1) transmitted by a PDCCH in the CORESET (e.g.,indicated/provided by higher layer parameter, TCI-PresentInDCI). Theantenna port quasi co-location may indicate a quasi co-locationinformation of one or more DMRS antenna ports for a PDCCH reception inthe CORESET. The CORESET index may be unique among the one or more DLBWPs of the serving cell. The wireless device may determine/considerthat a TCI field is absent/disabled in the DCI format, for example, ifthe higher layer parameter (e.g., TCI-PresentInDCI) is absent.

A first higher layer parameter (e.g., tci-StatesPDCCH-ToAddList) and asecond higher layer parameter (e.g., tci-StatesPDCCH-ToReleaseList) mayindicate/provide a subset of TCI states, such as defined by a thirdhigher layer parameter (e.g., PDSCH-Config). The wireless device may usethe subset of the TCI states to indicate/provide one or more QCLrelationships between one or more RS in a TCI state of the subset of theTCI states and one or more DM-RS ports of a PDCCH reception in theCORESET.

A base station may configure a CORESET, for a wireless device, with acorresponding CORESET index (e.g., indicated/provided by higher layerparameter, controlResourceSetId) that is non-zero. The base station mayor may not configure the wireless device with a configuration of one ormore TCI states for the CORESET (e.g., may or may not configure a firsthigher layer parameter, tci-StatesPDCCH-ToAddList, and/or a secondhigher layer parameter, tci-StatesPDCCH-ToReleaseList). The wirelessdevice may determine/assume that one or more DMRS antenna ports for aPDCCH reception in the CORESET is quasi co-located with an RS (e.g.,SS/PBCH block), for example, based on not being configured with theconfiguration of the one or more TCI states for the CORESET. Thewireless device may indicate/identify the RS during an initial accessprocedure.

A base station may configure a CORESET for a wireless device with acorresponding CORESET index (e.g., indicated/provided by higher layerparameter, controlResourceSetId) that is non-zero. The base station mayconfigure the wireless device with an initial configuration of at leasttwo TCI states, for the CORESET (e.g., using a first higher layerparameter, tci-StatesPDCCH-ToAddList and/or a second higher layerparameter, tci-StatesPDCCH-ToReleaseList). The wireless device mayreceive the initial configuration of the at least two TCI states fromthe base station. The wireless device may or may not receive a MAC CEactivation command for at least one of the at least two TCI states forthe CORESET. The wireless device may determine/assume that one or moreDM-RS antenna ports for a PDCCH reception in the CORESET is quasico-located with an RS (e.g., SS/PBCH block), for example, based on beingconfigured with the initial configuration for the CORESET and notreceiving the MAC CE activation command for the CORESET. The wirelessdevice may indicate/identify the RS during an initial access procedure.

A base station may configure a CORESET for a wireless device with acorresponding CORESET index (e.g., indicated/provided by higher layerparameter controlResourceSetId) that is equal to zero. The wirelessdevice may not receive a MAC CE activation command for a TCI state forthe CORESET. The wireless device may determine/assume that one or moreDM-RS antenna ports for a PDCCH reception in the CORESET is quasico-located with an RS (e.g., SS/PBCH block), for example, based on notreceiving the MAC CE activation command. The wireless device mayindicate/identify the RS during an initial access procedure. Thewireless device may indicate/identify the RS from a most recent RAprocedure. The wireless device may not initiate (e.g., refrain frominitiating) the most recent RA procedure based on or in response toreceiving a PDCCH order triggering a non-contention based RA procedure.

A base station may configure a wireless device with a single TCI statefor a CORESET. The base station may configure the single TCI state usinga first higher layer parameter (e.g., tci-StatesPDCCH-ToAddList) and/ora second higher layer parameter (e.g., tci-StatesPDCCH-ToReleaseList).The wireless device may determine/assume that one or more DM-RS antennaports for a PDCCH reception in the CORESET is quasi co-located with oneor more DL RSs configured by the single TCI state, for example, based onbeing configure with the single TCI state for the CORESET.

A base station may configure a CORESET for a wireless device. The basestation may configure the wireless device with a configuration of atleast two TCI states for the CORESET (e.g., using a first higher layerparameter, tci-StatesPDCCH-ToAddList, and/or a second higher layerparameter tci-StatesPDCCH-ToReleaseList). The wireless device mayreceive the configuration of the at least two TCI states from the basestation. The wireless device may receive a MAC CE activation command forat least one of the at least two TCI states for the CORESET. Thewireless device may determine/assume that one or more DM-RS antennaports for a PDCCH reception in the CORESET is quasi co-located with oneor more DL RSs configured by the single TCI state, for example, based onthe receiving the MAC CE activation command for the at least one of theat least two TCI states.

A base station may configure a CORESET for a wireless device with acorresponding CORESET index (e.g., indicated/provided by higher layer,parameter controlResourceSetId) that is equal to zero. The base stationmay configure the wireless device with a configuration of at least twoTCI states for the CORESET. The wireless device may receive theconfiguration of the at least two TCI states from the base station. Thewireless device may receive a MAC CE activation command for at least oneof the at least two TCI states for the CORESET. The wireless device maydetermine/expect that a QCL type (e.g., QCL-TypeD) of a first RS (e.g.,CSI-RS) in the at least one of the at least two TCI states isindicated/provided by a second RS (e.g., SS/PBCH block), for example,based on the CORESET index being equal to zero. The wireless device maydetermine/expect that a QCL type (e.g., QCL-TypeD) of a first RS (e.g.,CSI-RS) in the at least one of the at least two TCI states is spatiallyQCL-ed with a second RS (e.g., SS/PBCH block), for example, based on theCORESET index being equal to zero.

A wireless device may receive a MAC CE activation command for at leastone of at least two TCI states for a CORESET. A PDSCH transmission maycomprise the MAC CE activation command. The wireless device may send(e.g., transmit) a HARQ-ACK information for the PDSCH in a slot. Thewireless device may apply the MAC CE activation command a time duration(e.g., 3 ms, 5 ms, or any other quantity of time duration) after theslot, for example, if the wireless device receives the MAC CE activationcommand for the at least one of the at least two TCI states for theCORESET, and/or based on (e.g., after or in response to) thetransmitting HARQ-ACK information in the slot. A first BWP may be activein a second/other slot, for example, if the wireless device applies theMAC CE activation command in the second/other slot. The first BWP may bean active BWP, for example, based on the first BWP being active in thesecond/other slot.

A base station may configure a wireless device with one or more DL BWPsin a serving cell. The wireless device may be configured (e.g., byhigher layers) with one or more (e.g., 3, 5, 10, or any other quantityof) search space sets for a DL BWP of the one or more DL BWPs. Thewireless device may be configured by a higher layer parameter (e.g.,SearchSpace), for a search space set of the one or more search spacesets, at least one of: a search space set index (e.g.,indicated/provided by a higher layer parameter searchSpaceId); anassociation between the search space set and a CORESET (e.g.,indicated/provided by a higher layer parameter controlResourceSetId); aPDCCH monitoring periodicity of a first number of slots and a PDCCHmonitoring offset of a second number of slots (e.g., indicated/providedby a higher layer parameter monitoringSlotPeriodicityAndOffset); a PDCCHmonitoring pattern within a slot, indicating first symbol(s) of theCORESET within the slot for PDCCH monitoring, (e.g., indicated/providedby a higher layer parameter monitoringSymbolsWithinSlot); a duration ofa third number of slots (e.g., indicated/provided by a higher layerparameter duration); a number of PDCCH candidates; and/or an indicationthat the search space set is either a common search space set or awireless device-specific search space set (e.g., indicated/provided by ahigher layer parameter searchSpaceType). The duration may indicate aquantitiy of slots comprising the search space set.

The wireless device may determine a PDCCH monitoring occasion, on anactive DL BWP, for example, based on the PDCCH monitoring periodicity,the PDCCH monitoring offset, and/or the PDCCH monitoring pattern withina slot. The wireless device may determine, for the search space set,that a PDCCH monitoring occasion exists in a slot. The wireless devicemay monitor at least one PDCCH for the search space set for the durationof third number of slots (e.g., consecutive slots) starting from theslot.

A wireless device may monitor one or more PDCCH candidates in a USS seton an active DL BWP of a serving cell. A base station may not configurethe wireless device with a carrier indicator field. The wireless devicemay monitor the one or more PDCCH candidates without the carrierindicator field, for example, if the base station does not configure thewireless device with the carrier indicator field.

A wireless device may monitor one or more PDCCH candidates in a USS seton an active DL BWP of a serving cell. A base station may configure thewireless device with a carrier indicator field. The wireless device maymonitor the one or more PDCCH candidates with the carrier indicatorfield, for example, if the base station configures the wireless devicewith the carrier indicator field.

A base station may configure a wireless device to monitor one or morePDCCH candidates with a carrier indicator field in a first cell. Thecarrier indicator field may indicate a second cell. The carrierindicator field may correspond to a second cell. The wireless device maynot determine/expect to monitor the one or more PDCCH candidates on anactive DL BWP of the second cell, for example, based on monitoring theone or more PDCCH candidates, in the first cell, with the carrierindicator field indicating the second cell.

A wireless device may monitor one or more PDCCH candidates on an activeDL BWP of a serving cell. The wireless device may monitor the one ormore PDCCH candidates for the serving cell, for example, based onmonitoring the one or more PDCCH candidates on the active DL BWP of theserving cell.

A wireless device may monitor one or more PDCCH candidates on an activeDL BWP of a serving cell. The wireless device may monitor the one ormore PDCCH candidates at least for the serving cell, for example, basedon monitoring the one or more PDCCH candidates on the active DL BWP ofthe serving cell. The wireless device may monitor the one or more PDCCHcandidates for the serving cell and/or at least a second serving cell.

A base station may configure a wireless device with one or more cells.The base station may configure the wireless device for a single-celloperation, for example, if a quantity of the one or more cells is one.The base station may configure the wireless device for an operation witha carrier aggregation in a same frequency band (e.g., intra-band), forexample, if a quantity of the one or more cells is more than one.

The wireless device may monitor one or more PDCCH candidates inoverlapping PDCCH monitoring occasions in a plurality of CORESETs onactive DL BWP(s) of the one or more cells. The plurality of the CORESETsmay have different QCL-TypeD properties.

The plurality of CORESETs may comprise a first CORESET and/or a secondCORESET. A first PDCCH monitoring occasion in the first CORESET of afirst cell (e.g., of the one or more cells) may overlap with a secondPDCCH monitoring occasion in a second CORESET of the first cell. Thewireless device may monitor at least one first PDCCH candidate in thefirst PDCCH monitoring occasion on an active DL BWP (e.g., of the activeDL BWP(s)) of the first cell. The wireless device may monitor at leastone second PDCCH candidate in the second PDCCH monitoring occasion onthe active DL BWP of the first cell.

The one or more cells may comprise a first cell and a second cell. Afirst PDCCH monitoring occasion in a first CORESET of a first cell mayoverlap with a second PDCCH monitoring occasion in a second CORESET of asecond cell. The wireless device may monitor at least one first PDCCHcandidate in the first PDCCH monitoring occasion on a first active DLBWP (e.g., of the active DL BWP(s)) of the first cell. The wirelessdevice may monitor at least one second PDCCH candidate in the secondPDCCH monitoring occasion on a second active DL BWP (e.g., of the activeDL BWP(s)) of the second cell.

A first QCL type property (e.g., QCL-TypeD) of the first CORESET may bedifferent from a second QCL type property (e.g., QCL-TypeD) of thesecond CORESET. The wireless device may use a CORESET determinationrule. For example, the wireless device may use a CORESET determinationrule to determine a selected CORESET, of the plurality of the CORESETs,of a cell of one or more cells. The wireless device may determine theselected CORESET, for example, based on the monitoring the one or morePDCCH candidates in the overlapping PDCCH monitoring occasions in afirst plurality of CORESETs and a second plurality of the CORESETshaving the different QCL type properties. The wireless device maymonitor at least one PDCCH candidate, in the overlapping PDCCHmonitoring occasions, in the selected CORESET on an active DL BWP of thecell, for example, based on determining the selected CORESET. Theselected CORESET may be associated with a search space set. Theassociation may be indicated/provided by a higher layer parameter (e.g.,controlResourceSetId).

One or more CORESETs of the plurality of CORESETs may be associated witha CSS set. The association of the one or more CORESETs of the pluralityof CORESETs with the CSS set may comprise that at least one search spaceset of a CORESET of the one or more CORESETs has at least one PDCCHcandidate in the overlapping PDCCH monitoring occasions and/or is a CSSset. The association between the at least one search space set and theCORESET may be indicated/provided by a higher layer parameter (e.g.,controlResourceSetId).

A first CORESET may be associated with a first CSS set. The firstCORESET may be associated with a first USS set. A second CORESET may beassociated with a second CSS set. The second CORESET may be associatedwith a second USS set. Association of a CORESET (e.g., the firstCORESET, the second CORESET) with a CSS set (e.g., first CSS set, secondCSS set) may comprise that at least one search space of the CORESET isthe CSS set. Association of CORESET (e.g., the first CORESET, the secondCORESET) with an USS set (e.g., first USS set, second USS set) maycomprise that at least one search space of the CORESET is the USS set.The one or more CORESETs may comprise the first CORESET and the secondCORESET, for example, if the first CORESET is associated with the firstCSS set and the second CORESET is associated with the second CSS set.

One or more selected cells may comprise the first cell and the secondcell, for example, if the first CORESET is configured in the first celland the second CORESET is configured in the second cell. The one or moreselected cells may comprise the first cell, for example, if the firstCORESET is configured in the first cell and the second CORESET isconfigured in the first cell. At least one CORESET may comprise thefirst CORESET and the second CORESET. A first search space set of thefirst CORESET of the at least one CORESET may be indicated/identified bya first search space set specific index (e.g., indicated/provided by ahigher layer parameter searchSpaceId). The wireless device may monitorthe at least one first PDCCH candidate in the first PDCCH monitoringoccasion in the first CORESET associated with the first search spaceset. The association may be indicated/provided by a higher layerparameter (e.g., controlResourceSetId). A second search space set of thesecond CORESET of the at least one CORESET may be indicated/identifiedby a second search space set specific index (e.g., indicated/provided bya higher layer parameter searchSpaceId). The wireless device may monitorthe at least one second PDCCH candidate in the second PDCCH monitoringoccasion in the second CORESET associated with the second search spaceset. The association may be indicated/provided by a higher layerparameter (e.g., controlResourceSetId). The first search space setspecific index may be lower than the second search space set specificindex. The wireless device may select the first search space set (e.g.,for a CORESET determination rule), for example, if the first searchspace set specific index is lower than the second search space setspecific index. The wireless device may monitor the at least one firstPDCCH candidate in the first PDCCH monitoring occasion in the firstCORESET on the active DL BWP of the first cell, for example, based ondetermining/selecting the first search space set. The wireless devicemay stop monitoring the at least one second PDCCH candidate in thesecond PDCCH monitoring occasion in the second CORESET on the active DLBWP of the first cell, for example, based on determining/selecting thefirst search space set. The wireless device may stop/drop monitoring theat least one second PDCCH candidate in the second PDCCH monitoringoccasion in the second CORESET on the active DL BWP of the first cell,for example, based on determining/selecting the first search space set.

The first cell may be indicated/identified by a first cell-specificindex and the second cell may be indicated/identified by a secondcell-specific index. The first cell-specific index may be less than thesecond cell-specific indexThe wireless device may select the first cell,based on or in response to the first cell-specific index being less thanthe second cell-specific index, for example, if the one or more selectedcells comprises the first cell and the second cell.

The one or more CORESETs may comprise the first CORESET, for example, ifthe first CORESET is associated with the first CSS set and the secondCORESET is associated with the second USS set. The one or more selectedcells may comprise the first cell, for example, if the one or moreCORESETS comprises the first CORESET and the first CORESET is configuredin the first cell.

The one or more CORESETs may comprise the second CORESET. The one ormore selected cells may comprise the first cell, for example, if the theone or more CORESETs comprises the second CORESET and the second CORESETis configured in the first cell. The one or more selected cells maycomprise the second cell, for example, if the the one or more CORESETscomprises the second CORESET and the second CORESET is configured in thesecond cell.

The wireless device may determine that the one or more CORESETs areassociated with one or more selected cells of the one or more cells. Thebase station may configure a first CORESET and a second CORESET of theone or more CORESETs in a first cell of the one or more selected cells.Tthe base station may configure a third CORESET of the one or moreCORESETs in a second cell of the one or more selected cells. The firstcell and the second cell may be different (or the same).

The wireless device may receive, from the base station, one or moreconfiguration parameters. The one or more configuration parameters mayindicate, for example, cell-specific indices (e.g., indicated/providedby a higher layer parameter servCellIndex) for the one or more cells.Each cell of the one or more cells may be indicated/identified by arespective one cell-specific index of the cell-specific indices. Acell-specific index of a cell of the one or more selected cells may beleast among the cell-specific indices of the one or more selected cells.

The wireless device may select (e.g., for the CORESET determinationrule) the cell, for example, if the cell-specific index of the cell isleast among the cell-specific indices of the one or more selected cells.The base station may configure at least one CORESET of the one or moreCORESETs in the selected cell. At least one search space set of the atleast one CORESET may have at least one PDCCH candidate in theoverlapping PDCCH monitoring occasions and/or may be a CSS set.

The one or more configuration parameters may indicate search space setspecific indices for the at least one search space set of the cell. Theindices may be indicated/provided by a higher layer parameter (e.g.,searchSpaceId). Each search space set of the at least one search spaceset may be indicated/identified by a respective search space setspecific index of the search space set specific indices. The wirelessdevice may determine that a search space specific index of a searchspace set of the at least one search space set may be least among thesearch space set specific indices of the at least one search space set.The wireless device may determine/select, for the CORESET determinationrule, the search space set, for example, if the search space specificindex of the search space set specific index is least among the searchspace set specific indices of the at least one search space set. Thesearch space set may be associated with a selectedCORESET of the atleast one CORESET. The association may be indicated/provided by a higherlayer parameter (e.g., controlResourceSetId).

The wireless device may monitor at least one PDCCH in the selectedCORESET of the plurality of the CORESETs on an active DL BWP of the cellof the one or more cells, for example, based on selecting the celland/or the selecting the search space set associated with the selectedCORESET. The wireless device may monitor the at least one PDCCH, forexample, if the wireless device monitors the one or more PDCCHcandidates in the overlapping PDCCH monitoring occasions in theplurality of CORESETs, and CORESETs in the plurality of the CORESETshave different QCL-Type (e.g. QCLTypeD) properties. The wireless devicemay determine/select, based on the CORESET determination rule, thedetermined/selected CORESET associated with the search space set and thecell.

The selected CORESET may have a first QCL-TypeD property. A secondCORESET of the plurality of the CORESETs may have a second QCL-TypeDproperty. The selected CORESET and the second CORESET may be different.The first QCL-TypeD property and the second QCL-TypeD property may besame. The wireless device may monitor at least one second PDCCHcandidate (e.g., in the overlapping PDCCH monitoring occasions) in thesecond CORESET of the plurality of the CORESETs, for example, if thefirst QCL-TypeD property of the selected CORESET and the secondQCL-TypeD property of the second CORESET are the same.

The first QCL-TypeD property and the second QCL-TypeD property may bedifferent. The wireless device may stop/drop monitoring at least onesecond PDCCH candidate (e.g., in the overlapping PDCCH monitoringoccasions) in the second CORESET of the plurality of the CORESETs, forexample, if the first QCL-TypeD property of the selected CORESET and thesecond QCL-TypeD property of the second CORESET are different. Thewireless device may stop/drop monitoring at least one second PDCCHcandidate (e.g., in the overlapping PDCCH monitoring occasions) in thesecond CORESET of the plurality of the CORESETs, for example, if thefirst QCL-TypeD property of the determined/selected CORESET and thesecond QCL-TypeD property of the second CORESET are different. Thewireless device may determine a quantity of active TCI states from theplurality of CORESETs.

A wireless device may determine/consider, for a CORESET determinationrule, that a first QCL type (e.g., QCL TypeD) property of a first RS(e.g., SS/PBCH block) is different from a second QCL type (e.g., QCLTypeD) property of a second RS (CSI-RS). A first RS (e.g., CSI-RS) maybe associated (e.g., QCL-ed) with an RS (e.g., SS/PBCH block) in a firstcell, for example, for the CORESET determination rule. A second RS(e.g., CSI-RS) may be associated (e.g., QCL-ed) with the RS in a secondcell. The wireless device may consider that a first QCL type (e.g., QCLTypeD) property of the first RS and a second QCL type (e.g., QCL TypeD)property of the second RS are the same, for example, if the first RS andthe second RS are associated with the RS.

A wireless device may monitor a search space set, or multiple searchspace sets associated with different CORESETs for one or more cells. Thewireless device may monitor multiple search space sets, for example, fora single cell operation or for an operation with carrier aggregation ina same frequency band. At least two monitoring occasions of at least twosearch space sets of the multiple search space sets may overlap in time(e.g., at least one symbol, at least one slot, subframe, etc). The atleast two search space sets may be associated with at least two firstCORESETs. The at least two first CORESETs may have different QCL-TypeDproperties. The wireless device may monitor at least one search spaceset associated with a selected CORESET in an active DL BWP of a cell,for example, based on a CORESET determination rule. The at least onesearch space set may be a CSS set. A cell-specific index of the cell maybe lowest among cell-specific indices of the one or more cellscomprising the cell. At least two second CORESETs of the cell maycomprise a CSS set. The wireless device may determine/select a CORESET(e.g., determined/selected CORESET) of the at least two second CORESETs,for example, if a search space specific index of a search space setassociated with the determined/selected CORESET is the least amongsearch space specific indices of search space sets associated with theat least two second CORESETs. The wireless device may monitor the searchspace set in the at least two monitoring occasions.

The wireless device may determine that the at least two first CORESETsmay or may not be associated with a CSS set. The wireless device maydetermine, for example, that each CORESET of the at least two firstCORESETs may not be associated with a CSS set. The wireless device maymonitor at least one search space set associated with a selected CORESETin an active DL BWP of a cell, for example, based on the CORESETdetermination rule and/or based on the determining that the at least twofirst CORESETs are not associated with a CSS set. The at least onesearch space set may be a USS set. A cell-specific index of the cell maybe least among cell-specific indices of the one or more cells comprisingthe cell. At least two second CORESETs of the cell may comprise a USSset. The wireless device may determine/select a CORESET (e.g.,determined/selected CORESET) of the at least two second CORESETs, forexample, if a search space specific index of a search space setassociated with the selected CORESET is the least among search spacespecific indices of search space sets associated with the at least twosecond CORESETs. The wireless device may monitor the search space set inthe at least two monitoring occasions.

A base station may indicate to a wireless device, a TCI state for aCORESET of a serving cell, for example, by sending a TCI stateindication for wireless device-specific (e.g., UE-specific) PDCCH MACCE. The base station may indicate the TCI state for a PDCCH reception.The wireless device (e.g., a MAC entity of the wireless device) mayindicate to lower layers (e.g., a PHY entity) information regarding theTCI state indication for the wireless device-specific PDCCH MAC CE, forexample, if the wireless device (e.g., the MAC entity) receives a TCIstate indication for the wireless device-specific PDCCH MAC CE on/for aserving cell.

A TCI state indication for a wireless device-specific PDCCH MAC CE maybe indicated/identified by a MAC PDU subheader with LCID. The TCI stateindication for a wireless device-specific PDCCH MAC CE may have a fixedsize of a quantity of bits such as 16 bits (or any other quantity ofbits) and may comprise one or more fields. The one or more fields maycomprise a serving cell ID, CORESET ID, TCI state ID, and/or a reservedbit.

The serving cell ID may indicate an identity of the serving cell forwhich the TCI state indication applies. The length of the serving cellID may be n bits (e.g., n may be 5 bits, or any other quantity of bits).The CORESET ID may indicate a control resource set. The control resourceset may be indicated/identified with a control resource set ID (e.g.,ControlResourceSetId). The length of the CORESET ID may be n3 bits(e.g., n3 may be 4 bits, or any other quantity of bits). The TCI stateID (e.g., TCI-StateId) may indicate a TCI state. The TCI state may beapplicable to the control resource set indicated/identified by theCORESET ID. The length of the TCI state ID may be n4 bits (e.g., n4=6bits, or any other quantity of bits). An information element (e.g.,ControlResourceSet) may be used to configure a time/frequency controlresource set (CORESET) in which to search for DCI.

An information element (e.g., TCI-State) may associate one or two DLreference signals with a corresponding QCL type. The TCI-State maycomprise one or more fields (e.g., TCI-StateId and QCL-Info). TheTCI-StateID may indicate (e.g., identify) a configuration of a TCIstate. The QCL-Info may comprise one or more second fields. The one ormore second fields may comprise serving cell index, BWP indicator (e.g.,identifier), a reference signal indicator (e.g., SSB-index,NZP-CSI-RS-ResourcelD), and/or a QCL Type indicator (e.g., QCL-typeA,QCL-typeB, QCL-typeC, QCL-typeD).

A reference signal may be located in a serving cell. A reference signalindicator (e.g., index) may indicate the reference signal. The servingcell index may indicate the serving cell. An information elementTCI-State may apply to a serving cell in which the information elementTCI-State is configured, for example, if a serving cell index is absentin the information element TCI-State. The reference signal may belocated on a second serving cell other than the serving cell in whichthe information element TCI-State is configured only if the QCL-Type isconfigured as a first type (e.g., TypeD, TypeA, TypeB). The BWP ID mayindicate a downlink BWP of the serving cell in which the referencesignal is located in.

An information element (e.g., SearchSpace) may define how/where tosearch forPDCCH candidates in a search space. The search space may beindicated/identified by an indicator (e.g., searchSpaceId) field in theinformation element SearchSpace. Each search space may be associatedwith a CORESET (e.g., ControlResourceSet). The CORESET may be indicated,for example, by a controlResourceSetId field in the information elementSearchSpace. The controlResourceSetId field may indicate the CORESETapplicable for the SearchSpace.

A wireless device may indicate (e.g., report), to a base station, an RFcapability of the wireless device via a capability signaling of thewireless device. The RF capability may be reception capability and/ortransmission capability. The base station may determine whether thewireless device may receive (and/or transmit) simultaneous physicalchannels and/or RSs via different receiving (and/or transmitting) beamsfrom one or more component carriers in the downlink (and/or uplink) atthe same time instant, for example, based on the capability signaling.

A base station may configure (e.g., in intra-band CA) one or morecomponent carriers in the same band. The one or more component carriersmay be powered by a same and a single RF chain. The wireless device mayapply a single and a same set of TX/RX spatial parameters to the one ormore component carriers in the same band at a same (or substantially thesame) time instant. Applying the single and the same set of TX/RXspatial parameters may impose limitations on flexibility of multiplexingphysical channels (e.g., PDSCH/PUSCH, PDCCH/PUCCH, SRS, PRACH, etc.)and/or reference signals (RSs) (e.g., CSI-RS, SSB, etc.), for example,within and/or across the one or more component carriers.

A first channel/RS of a first serving cell (e.g., PCell, BWP) and asecond channel/RS of a second serving cell (e.g., SCell, BWP) may bemultiplexed in the same OFDM symbols, for example if the firstchannel/RS is associated with a second channel/RS (e.g., QCL-ed with QCLtype as QCL TypeD). A wireless device may transmit/receive (e.g.,simultaneously transmit/receive) the multiplexed first channel/RS andthe second channel/RS in the uplink/downlink.

One or more first antenna ports of a first serving cell and one or moresecond antenna ports of a second serving cell may not be associated(e.g., may not be QCL-ed with QCL type as QCL-TypeD). A wireless devicemay not determine (e.g., may not infer) one or more channel propertiesof the one or more first antenna ports of the first serving cell fromthe one or more second antenna ports of the second serving cell.

The first channel/RS (e.g., PDSCH/PUSCH, PDCCH/PUCCH, SRS, PRACH,CSI-RS, SSB, etc.) and the second channel/RS (e.g., PDSCH/PUSCH,PDCCH/PUCCH, SRS, PRACH, CSI-RS, SSB, etc.) may not be associated (e.g.,may not be QCL-ed with QCL type as QCL-TypeD). A base station mayconfigure the first channel/RS may with a first QCL assumption and thesecond channel/RS with a second QCL assumption. A firsttransmission/reception of the first channel/RS and a secondtransmission/reception of the second channel/RS may overlap (e.g., in atleast one OFDM symbol). The wireless device may not perform the firsttransmission/reception and the second transmission/receptionsimultaneously, for example, if the first QCL assumption and the secondQCL assumption are not the same.

FIG. 16A, FIG. 16B and FIG. 16C show examples of SRS transmissions. Abase station 1604 may request (e.g., in an indication) a wireless device1608 to send (e.g., transmit) one or more SRSs for channel qualityestimation (e.g., CSI acquisition, or uplink beam management). The basestation 1604 may request the one or more SRSs to enablefrequency-selective scheduling on the UL. SRS transmissions may be usedfor other purposes, such as to enhance power control and/or to supportvarious startup functions for wireless devices not recently scheduled.Some example uses of SRSs may comprise initial MCS selection, initialpower control for data transmissions, timing advance, and/or frequencysemi-selective scheduling.

The base station 1604 may request (e.g., in an indication) the wirelessdevice 1608 to send (e.g., transmit) at least one of: periodic SRStransmission (type 0); aperiodic SRS transmission (type 1); and/or SPSRS transmission. Subframes in which SRSs may be sent (e.g.,transmitted) may be indicated, for example, for periodic SRStransmission, by cell-specific broadcast signaling, and/or wirelessdevice-specific signaling.

FIG. 16A shows an example of periodic SRS transmission. Periodicity ofthe periodic SRS transmission may be, for example, between 2 ms to 160ms (or any other quantity of time). The wireless device 1608 may send(e.g., transmit) SRSs 1616 using SC-FDMA or using OFDM symbols in theconfigured subframes. The wireless device 1608 may send (e.g., transmit)the SRSs 1616, for example, in last one or more symbols (e.g., 1, 2, 3,or any other quantity of symbols) in a subframe. FIG. 16B shows anexample of an aperiodic SRS transmission. The wireless device 1608 maysend (e.g., transmit) SRSs 1624 aperiodically, for example, based onreceiving a DCI 1620 indicating an aperiodic SRS transmission. FIG. 16Cshows an example of an SP SRS transmission. The wireless device 1608 mayreceive configuration parameters (e.g., in an RRC configuration 1628) ofan SP SRS transmission. The configuration parameters may comprise atleast one of: a periodicity of the SP SRS transmission (e.g.,periodicity 1644); a time/frequency radio resource; cyclic shiftparameters; and/or other radio parameters (e.g., bandwidth, frequencyhopping, transmission comb and offset, frequency-domain position, etc.).The wireless device 1608 may send (e.g., transmit) the SP SRSs 1636, forexample, based on or in response to receiving a first message (e.g., aMAC CE 1632) activating the SP SRSs 1636. The wireless device 1608 mayrepeat the SP SRS transmission (e.g., with the periodicity 1644), forexample, at least until the wireless device 16008 receives a secondmessage (e.g., another MAC CE 1640) deactivating the SP SRSs 1636. Thewireless device 1608 may deactivate the SP SRS 1636 and stop the SP SRSstransmission, for example, based on or in response to receiving the MACCE 1640 deactivating the SP SRSs 1636.

The wireless device and the base station may be aligned to use a sametransmit/receive filter for transmission and reception of an SRS. Thebase station may not receive the SRS and/or may receive the SRS witherrors, for example, if the base station receives an SRS with a firsttransmitting/receiving filter (e.g., associated with a first RS) and thewireless device transmits the SRS with a second (e.g., different)transmitting/receiving filter (e.g., associated with a second RS). Usinga same transmit/receive filter for SRS transmission/reception may enablemore reliable and/or more robust communication. Using the sametransmit/receive filter for SRS transmission/reception may improveuplink channel estimation and/or improve performance of downlinkscheduling.

Various examples described herein may improve the performance of uplinkchannel estimation. Various examples described herein may improve theperformance of downlink scheduling. Various examples described hereinmay improve the performance of uplink beam management.

FIG. 17 and FIG. 18 show example uplink beam management procedures. Awireless device (e.g., the wireless device 1704 in FIG. 17 or thewireless device 1804 in FIG. 18) may receive, from a base station (e.g.,the base station 1708 in FIG. 1 or the base station 1808 in FIG. 2), oneor more messages (e.g., RRC configuration messages, RRC reconfigurationmessages, and/or the like). The one or more messages may comprise one ormore configuration parameters of a plurality of cells. The plurality ofcells may comprise a first cell (e.g., Cell 1712-1 in FIG. 17 and cell1812-1 in FIG. 18) and a second cell (e.g., Cell 1712-2 in FIG. 17 andcell 1812-2 in FIG. 18).

One one or more configuration parameters may indicate cell-specificindices (e.g., indicated/provided by a higher layer parameterservCellIndex) for the plurality of cells. Each cell of the plurality ofcells may be indicated/identified by a respective one cell-specificindex of the cell-specific indices. The first cell (may beindicated/identified by a first cell-specific index. The second cell maybe indicated/identified by a second cell-specific index.

The first cell-specific index and the second cell-specific index may bedifferent. The first cell-specific index and the second cell-specificindex may be the same.

The one or more configuration parameters may indicate one or more firstSRS resource sets for the first cell (e.g., using a higher layerparameter SRS-ResourceSet). The one or more first SRS resource sets maycomprise a first SRS resource set (e.g., first SRS set in FIG. 17 andFIG. 18).

The one or more configuration parameters may indicate one or more secondSRS resource sets for the second cell (e.g., using a higher layerparameter SRS-ResourceSet). The one or more second SRS resource sets maycomprise a second SRS resource set (e.g., second SRS set in FIG. 17 andFIG. 18).

The one or more configuration parameters may indicate SRS resource setindicators/indices for the one or more first SRS resource sets. The SRSresource set indicators may be indicated/provided by a higher layerparameter (e.g., SRS-ResourceSetId). Each SRS resource set of the one ormore first SRS resource sets may be indicated (e.g., identified) by arespective one SRS resource set index of the SRS resource set indices.The first SRS resource set (e.g., first SRS Set in FIG. 17 and FIG. 18)may be indicated/identified by a first SRS resource set index.

The one or more configuration parameters may indicate SRS resource setindicators/indices for the one or more second SRS resource sets. The SRSresource set indicators may be indicated/provided by a higher layerparameter (e.g., SRS-ResourceSetId). Each SRS resource set of the one ormore second SRS resource sets may be indicated/identified by arespective one SRS resource set index of the SRS resource set indices.The second SRS resource set (e.g., second SRS Set in FIG. 17 and FIG.18) may be indicated/identified by a second SRS resource set index.

The first SRS resource set index and the second SRS resource set indexmay be the same. The first SRS resource set index and the second SRSresource set index may be different.

The first SRS resource set may comprise one or more first SRS resources.The once or more SRS resources may be indicated/provided by a higherlayer parameter (e.g., SRS-Resource). The one or more first SRSresources may comprise a first SRS resource.

The one or more configuration parameters may indicate SRS resourceindicators (e.g., indices) for the one or more first SRS resources. TheSRS resource indicators may be indicated/provided by a higher layerparameter (e.g., srs-ResourceId). Each SRS resource of the one or morefirst SRS resources may be indicated/identified by a respective one SRSresource index of the SRS resource indices. The first SRS resource maybe indicated/identified by a first SRS resource index.

The one or more configuration parameters may indicate SRS resource typesfor the one or more first SRS resources. The SRS resource types may beindicated/provided by a higher layer parameter (e.g., resourceType).Each SRS resource of the one or more first SRS resources may beindicated (e.g., configured) by a respective one SRS resource type ofthe SRS resource types. The first SRS resource may beindicated/configured by a first SRS resource type (e.g., type-1 as shownin FIG. 18). The first SRS resource type may correspond to a periodicSRS transmission. The first SRS resource type may correspond to a SP SRStransmission. The first SRS resource type may correspond to an aperiodicSRS transmission.

The one or more configuration parameters may indicate SRS spatialrelations for the one or more first SRS resources. The SRS spatialrelations may be indicated/provided by a higher layer parameter (e.g.,spatialRelationInfo). Each SRS resource of the one or more first SRSresources may be indicated (e.g., configured) by a respective one SRSspatial relation of the SRS spatial relations. The first SRS resourcemay be indicated/configured by a first SRS spatial relation. The firstSRS spatial relation may indicate a first reference RS (e.g., RS 1716-1in FIG. 17 and RS 1816-1 in FIG. 18). The first SRS spatial relation maycomprise a first RS index indicating the first reference RS. The firstreference RS may be a first SS/PBCH block. The first reference RS may bea first CSI-RS (e.g., periodic CSI-RS, SP CSI-RS, aperiodic CSI-RS). Thefirst reference RS may be a first SRS (e.g., periodic SRS, SP SRS,aperiodic SRS).

The wireless device may perform a first SRS transmission (orsend/transmit a first target SRS) for the first SRS resource with afirst spatial domain filter. The wireless device may receive the firstSS/PBCH block with a first spatial domain transmission filter. The firstspatial domain filter for the first SRS transmission may be the firstspatial domain transmission filter, for example, if the first referenceRS is the first SS/PBCH block.

The wireless device may receive the first CSI-RS with a first spatialdomain transmission filter. The first spatial domain filter for thefirst SRS transmission may be the first spatial domain transmissionfilter, for example, if the first reference RS is the first CSI-RS.

The wireless device may send (e.g., transmit) the first SRS with a firstspatial domain transmission filter. The first spatial domain filter forthe first SRS transmission may be the first spatial domain transmissionfilter, for example, if the first reference RS is the first.

The second SRS resource set may comprise one or more second SRSresources. The second SRS resource set may be indicated/provided by ahigher layer parameter (e.g., SRS-Resource). The one or more second SRSresources may comprise a second SRS resource.

The one or more configuration parameters may indicate SRS resourceindices for the one or more second SRS resources. The SRS resourceindices may be indicated/provided by a higher layer parameter (e.g.,srs-ResourceId). Each SRS resource of the one or more second SRSresources may be identified by a respective one SRS resource index ofthe SRS resource indices. The second SRS resource may beindicated/identified by a second SRS resource index.

The one or more configuration parameters may indicate SRS resource typesfor the one or more second SRS resources. The SRS resource types may beindicated/provided by a higher layer parameter (e.g., resourceType).Each SRS resource of the one or more second SRS resources may beindicated/configured by a respective one SRS resource type of the SRSresource types. The second SRS resource may be indicated/configured by asecond SRS resource type (e.g., Type-2 as shown in FIG. 18). The secondSRS resource type may correspond to a periodic SRS transmission. Thesecond SRS resource type may correspond to a SP SRS transmission. Thesecond SRS resource type may correspond to an aperiodic SRStransmission.

The one or more configuration parameters may indicate SRS spatialrelations (for the one or more second SRS resources. The SRS spatialrelations may be indicated/provided by a higher layer parameter (e.g.,spatialRelationInfo). Each SRS resource of the one or more second SRSresources may be indicated/configured by a respective one SRS spatialrelation of the SRS spatial relations. The second SRS resource may beindicated/configured by a second SRS spatial relation. The second SRSspatial relation may indicate a second reference RS (e.g., RS 1716-2 inFIG. 17 and RS 1816-2 in FIG. 18). The second SRS spatial relation maycomprise a second RS index indicating the second reference RS. Thesecond reference RS may be a second SS/PBCH block. The second referenceRS may be a second CSI-RS (e.g., periodic CSI-RS, SP CSI-RS, aperiodicCSI-RS). The second reference RS may be a second SRS (e.g., periodicSRS, SP SRS, aperiodic SRS).

The wireless device may perform a second SRS transmission (orsend/transmit a second target SRS) for the second SRS resource with asecond spatial domain filter. The wireless device may receive the secondSS/PBCH block with a second spatial domain transmission filter. Thesecond spatial domain filter for the second SRS transmission may be thesecond spatial domain transmission filter, for example, if the secondreference RS is the second SS/PBCH block.

The wireless device may receive the second CSI-RS with a second spatialdomain transmission filter. The second spatial domain filter for thesecond SRS transmission may be the second spatial domain transmissionfilter, for example, if the second reference RS is the second CSI-RS.

The wireless device may send (e.g., transmit) the second SRS with asecond spatial domain transmission filter. The second spatial domainfilter for the second SRS transmission may be the second spatial domaintransmission filter, for example, if the second reference RS is thesecond SRS.

The first cell and the second cell may operate using intra-band CA. Thefirst cell may operate in a first band and the second cell may operatein a second band. The first band and the second band may be the same.

A first SRS transmission for the first SRS resource may be triggered.The base station may request the first SRS transmission (e.g., periodicSRS, SP SRS, aperiodic SRS).

A second SRS transmission for the second SRS resource may be triggered.The base station may request the second SRS transmission (e.g., periodicSRS, SP SRS, aperiodic SRS).

The wireless device may determine that the first SRS resource of thefirst SRS transmission and the second SRS resource of the second SRStransmission overlap in a time duration. The time duration may be atleast one symbol (or any other quantity of symbols). The time durationmay be at least one slot (or any other quantity of slots). The timeduration may be at least one subframe (or any other quantity ofsubframes). The time duration may be at least one frame (or any otherquantity of frames).

The first SRS spatial relation of the first SRS resource and the secondSRS spatial relation of the second SRS resource may or may not bedifferent (e.g., may or may not be identical) in the time duration. Thefirst SRS spatial relation and the second SRS spatial relation beingdifferent may comprise that the wireless device may not simultaneouslyperform the first SRS transmission for the first SRS resource and thesecond SRS transmission for the second SRS resource in the timeduration. The first SRS spatial relation and the second SRS spatialrelation being different may comprise that the first reference RSindicated by the first SRS spatial relation and the second reference RSindicated by the second SRS spatial relation may be different. The firstSRS spatial relation and the second SRS spatial relation being differentmay comprise that the first reference RS indicated by the first srsspatial relation and the second reference RS indicated by the second SRSspatial relation are not QCL-ed.

The wireless device may be configured to apply one beam (or any quantityof beams) at a time for transmissions of SRSs. The wireless device maynot be configured to send/transmit two different SRSs with two differentbeams at the same time (or at substantially the same time). The wirelessdevice may prioritize an SRS spatial relation corresponding to one ofthe two different SRSs for transmission of both the SRSs. The wirelessdevice may use a single beam, for example, for transmission of both theSRSs.

In FIG. 17, the first cell-specific index may be less than the secondcell-specific index. The wireless device may prioritize one of the firstSRS spatial relation of the first SRS resource and the second SRSspatial relation of the second SRS resource, for example, if the firstSRS resource and the second SRS resource overlap in the time duration,and/or the first SRS spatial relation of the first SRS resource and thesecond SRS spatial relation of the second SRS resource are different.The wireless device may prioritize one of the first SRS spatial relationof the first SRS resource and the second SRS spatial relation of thesecond SRS resource, for example, based on cell-specific indices of thefirst cell and the second cell. The wireless device may prioritize thefirst SRS spatial relation of the first SRS resource, for example, ifthe first cell-specific index is less than the second cell-specificindex.

In FIG. 18, the first SRS resource type (e.g., type-1) of the first SRSresource may correspond to an aperiodic SRS transmission. The second SRSresource type (e.g., Type-2) of the second SRS resource may correspondto a periodic SRS transmission or to an SP SRS transmission. Theaperiodic SRS transmission may have a higher priority than the periodicSRS transmission. The aperiodic SRS transmission may have a higherpriority than the SP SRS transmission. The first SRS resource type mayhave a higher priority than the second SRS resource type, for example,based on the aperiodic SRS transmission having a higher priority thanthe periodic SRS transmission. The first SRS resource type may have ahigher priority than the second SRS resource type, for example, based onthe aperiodic SRS transmission having a higher priority than the SP SRStransmission.

In FIG. 18, the first SRS resource type (e.g., type-1) may correspond toa SP SRS transmission. The second SRS resource type (e.g., Type-2) maycorrespond to a periodic SRS transmission. The SP SRS transmission mayhave a higher priority than the periodic SRS transmission. The first SRSresource type may have a higher priority than the second SRS resourcetype, for example, based on the SP SRS transmission having a higherpriority than the periodic SRS transmission.

The wireless device may prioritize one of the first SRS spatial relationof the first SRS resource and the second SRS spatial relation of thesecond SRS resource, for example, if the first SRS resource and thesecond SRS resource overlap in the time duration, and/or if the firstSRS spatial relation of the first SRS resource and the second SRSspatial relation of the second SRS resource are different. The wirelessdevice may prioritize one of the first SRS spatial relation of the firstSRS resource and the second SRS spatial relation of the second SRSresource, for example, based on priorities of the first SRS resourcetype and the second SRS resource type. The wireless device mayprioritize the first SRS spatial relation of the first SRS resource, forexample, if the first SRS resource type has a higher priority than thesecond SRS resource type.

The first cell-specific index may be less than the second cell-specificindex. The first SRS resource type and the second SRS resource type maybe the same (e.g., both periodic SRS or both SP SRS or both aperiodicSRS). The wireless device may determine that the first SRS resource andthe second SRS resource overlap in the time duration, and/or the firstSRS spatial relation of the first SRS resource and the second SRSspatial relation of the second SRS resource are different. The wirelessdevice may prioritize the first SRS spatial relation of the first SRSresource, for example, if the first SRS resource type and the second SRSresource type are the same and the first cell-specific index is lessthan the second cell-specific index.

The prioritizing the first SRS spatial relation of the first SRSresource may comprise that the wireless device performs the second SRStransmission for the second SRS resource with the first SRS spatialrelation of the first SRS resource in the time duration. The performingthe second SRS transmission for the second SRS resource with the firstSRS spatial relation may comprise that the wireless device transmits thesecond SRS resource with the first spatial domain filter (e.g., of thefirst SRS transmission for the first SRS resource) in the time duration.The performing the second SRS transmission for the second SRS resourcewith the first SRS spatial relation may comprise that the wirelessdevice applies/uses the first spatial domain filter (e.g., of the firstSRS transmission for the first SRS resource) for the second SRStransmission in the time duration.

The prioritizing the first SRS spatial relation of the first SRSresource may comprise that the wireless device performs the first SRStransmission for the first SRS resource with the first SRS spatialrelation of the first SRS resource in the time duration. The performingthe first SRS transmission for the first SRS resource with the first SRSspatial relation may comprise that the wireless device transmits thefirst SRS resource with the first spatial domain filter (e.g., of thefirst SRS transmission for the first SRS resource) in the time duration.

The prioritizing the first SRS spatial relation of the first SRSresource may comprise that the first SRS spatial relation of the firstSRS resource overrides the second srs spatial relation of the second SRSresource in the time duration. The prioritizing the first SRS spatialrelation of the first SRS resource may comprise that the wireless devicedrops the second SRS transmission for the second SRS resource. Theprioritizing the first SRS spatial relation of the first SRS resourcemay comprise that the wireless device drops the second SRS transmissionfor the second SRS resource at least in the time duration. The droppingthe second SRS transmission may comprise stopping the second SRStransmission. The dropping the second SRS transmission may comprise notinitiating the second SRS transmission. The dropping the second SRStransmission may comprise not performing the second SRS transmission forthe second SRS resource in the time duration. The dropping the secondSRS transmission may comprise performing the first SRS transmission forthe first SRS resource in the time duration.

The prioritizing the first SRS spatial relation of the first SRSresource may comprise that the wireless device performs the second SRStransmission for the second SRS resource with the first SRS spatialrelation of the first SRS resource in the time duration. Theprioritizing the first SRS spatial relation of the first SRS resourcemay comprise that the wireless device performs the second SRStransmission for the second SRS resource with the second SRS spatialrelation of the second SRS resource outside of the time duration (e.g.,in portions of the second SRS resource that do not overlap with thefirst SRS resource).

A wireless device may be configured with multiple antennas and/orantenna panels. A wireless device may be configured to use a quantity ofbeams for transmission of multiple signals (e.g., to multiple receptionpoints). The wireless device may use a beam for transmission of morethan one signal (e.g., simultaneously).

The wireless device may use (e.g., simultaneously use) different beamsfor transmissions over different antenna panels. The wireless device maysend/transmit (e.g., simultaneously send/transmit) a first a signalusing a first beam (e.g., via a first antenna panel), and the secondsignal using a second beam (e.g., via a second antenna panel). The firstsignal and the second signal may be sent/transmitted in a first cell.The first signal and the second signal may overlap with a third signal(e.g., sent/transmitted in a second cell). The wireless device may needto determine/select one beam of first beam and the second beam tosend/transmit the third signal. The wireless device may determine/selectone beam of first beam and the second beam to transmit the third signal,for example, if the wireless device is only configured to use a maximumof two beams at a time. A base station may be aligned to use a beam(e.g., for signal reception), for example, based on a beam selectionprotocol used at the wireless device. The first signal the secondsignal, and the third signal may be associated with a first SRS, asecond SRS, and a third SRS, and may be used for uplink channelestimation at the base station. Uplink channel estimation based on SRSreception, at the base station, may not yield accurate results, forexample, if the base station is not aligned to use the beam based on thebeam selection protocol. This may result in inefficent uplink schedulingand/or downlink scheduling.

The wireless device may select and/or prioritize a beam of a signal,among signals (e.g., the first signal and the second signal) of thefirst cell, for transmission of another signal (e.g., the third signal)in the second cell. The wireless device may prioritize a transmissionbeam of a signal that is sent/transmitted via an antenna panel with thelowest-antenna panel index. The wireless device may prioritize atransmission beam of a signal that is associated with a signal resourceset identified with the lowest signal resource set index. The wirelessdevice may prioritize a transmission beam of a signal with the highestpriority. The wireless device may prioritize a transmission beam of asignal based on a combination of two or more of criteria (e.g., of theabove criteria). The base station may be aligned to use a beam that isbased on a prioritization rule applied at the wireless device. Beamselection/prioritization techniques described herein may be used, at thewireless device, for transmission of SRSs. This may result in improveddecoding/reception performance of SRS transmission, uplink channelestimation, uplink scheduling and/or downlink scheduling.

FIG. 19, FIG. 20, and FIG. 21 show examples of an uplink beammanagement. A base station and a wireless device may be configured tocommunicate with each other. A wireless device may receive, from a basestation (e.g., base station 1904 in FIG. 19, base station 2004 in FIG.20, and base station 2104 in FIG. 21) which may send, one or moremessages (e.g., RRC configuration messages). The one or more messagesmay comprise one or more configuration parameters of a plurality ofcells. The plurality of cells may comprise a first cell (e.g., cell1908-1 in FIG. 19, cell 2008-1 in FIG. 20, and cell 2108-1 in FIG. 21)and a second cell (e.g., cell 1908-2 in FIG. 19, cell 2008-2 in FIG. 20,and cell 2108-2 in FIG. 21).

The one or more configuration parameters may indicate cell-specificindices for the plurality of cells. The cell-specific indices may beindicated/provided by a higher layer parameter (e.g., servCellIndex).Each cell of the plurality of cells may be indicated/identified by arespective cell-specific index of the cell-specific indices. The firstcell may be indicated/identified by a first cell-specific index. Thesecond cell may be indicated/identified by a second cell-specific index.

The first cell-specific index and the second cell-specific index may bedifferent. The first cell-specific index and the second cell-specificindex may be the same.

The one or more configuration parameters may indicate one or more firstSRS resource sets for the first cell. The one or more first SRS resourcesets may be indicated/provided by a higher layer parameter (e.g.,SRS-ResourceSet). The one or more first SRS resource sets may comprise afirst SRS resource set (e.g., first SRS set in FIG. 19-FIG. 21) and athird SRS resource set (e.g., third SRS set in FIG. 19-FIG. 21).

The one or more configuration parameters may indicate one or more secondSRS resource sets for the second cell. The one or more second SRSresource sets may be indicated/provided by a higher layer parameter(e.g., SRS-ResourceSet). The one or more second SRS resource sets maycomprise a second SRS resource set (e.g., second SRS set in FIG. 19-FIG.21).

The one or more configuration parameters may indicate SRS resource setindices for the one or more first SRS resource sets. The SRS resourceset indices may be indicated/provided by a higher layer parameter (e.g.,SRS-ResourceSetId). Each SRS resource set of the one or more first SRSresource sets may be indicated/identified by a respective one SRSresource set index of the SRS resource set indices. The first SRSresource set (e.g., first SRS Set in FIG. 19-FIG. 21) may beindicated/identified by a first SRS resource set index. The third SRSresource set (e.g., third SRS Set in FIG. 19-FIG. 21) may beindicated/identified by a third SRS resource set index.

The one or more configuration parameters may indicate SRS resource setindices for the one or more second SRS resource sets. The SRS resourceset indices may be indicated/provided by a higher layer parameter (e.g.,SRS-ResourceSetId). Each SRS resource set of the one or more second SRSresource sets may be indicated/identified by a respective one SRSresource set index of the SRS resource set indices. The second SRSresource set (e.g., second SRS Set in FIG. 19-FIG. 21) may beindicated/identified by a second SRS resource set index.

The first SRS resource set index and the second SRS resource set indexmay be the same. The first SRS resource set index and the second SRSresource set index may be different. The third SRS resource set indexand the second SRS resource set index may be the same. The third SRSresource set index and the second SRS resource set index may bedifferent. The first SRS resource set index and the third SRS resourceset index may be different.

The first SRS resource set may comprise one or more first SRS resources.The one or more first SRS resources may be indicated/provided by ahigher layer parameter (e.g., SRS-Resource). The one or more first SRSresources may comprise a first SRS resource. The third SRS resource setmay comprise one or more third SRS resources. The one or more third SRSresources may be indicated/provided by a higher layer parameter (e.g.,SRS-Resource). The one or more third SRS resources may comprise a thirdSRS resource.

The one or more configuration parameters may indicate SRS resourceindices for the one or more first SRS resources. The SRS resourceindices may be indicated/provided by a higher layer parameter (e.g.,SRS-ResourceId). Each SRS resource of the one or more first SRSresources may be indicated/identified by a respective SRS resource indexof the SRS resource indices. The first SRS resource may beindicated/identified by a first SRS resource index.

The one or more configuration parameters may indicate SRS resourceindices for the one or more third SRS resources. The SRS resourceindices may be indicated/provided by a higher layer parameter (e.g.,SRS-ResourceId). Each SRS resource of the one or more third SRSresources may be indicated/identified by a respective SRS resource indexof the SRS resource indices. The third SRS resource may beindicated/identified by a third SRS resource index.

The one or more configuration parameters may indicate SRS resource typesfor the one or more first SRS resources. The SRS resource types may beindicated/provided by a higher layer parameter (e.g., resourceType).Each SRS resource of the one or more first SRS resources may beindicated/configured by a respective one SRS resource type of the SRSresource types. The first SRS resource may be indicated/configured by afirst SRS resource type (e.g., type-1 in FIG. 19-FIG. 21). The first SRSresource type may correspond to a periodic SRS transmission. The firstSRS resource type may correspond to a SP SRS transmission. The first SRSresource type may correspond to an aperiodic SRS transmission.

The one or more configuration parameters may indicate SRS resource typesfor the one or more third SRS resources. The SRS resource types may beindicated/provided by a higher layer parameter (e.g., resourceType).Each SRS resource of the one or more third SRS resources may beindicated/configured by a respective SRS resource type of the SRSresource types. The third SRS resource may be indicated/configured by athird SRS resource type (e.g., type-3 in FIG. 19-FIG. 21). The third SRSresource type may correspond to a periodic SRS transmission. The thirdSRS resource type may correspond to a SP SRS transmission. The third SRSresource type may correspond to an aperiodic SRS transmission.

The one or more configuration parameters may indicate SRS spatialrelations for the one or more first SRS resources. The SRS spatialrelations may be indicated/provided by a higher layer parameter (e.g.,spatialRelationInfo). Each SRS resource of the one or more first SRSresources may be indicated/configured by a respective SRS spatialrelation of the SRS spatial relations. The first SRS resource may beindicated/configured by a first SRS spatial relation. The first SRSspatial relation may indicate a first reference RS (e.g., RS 1916-1 inFIG. 19, RS 2016-1 in FIG. 20, and RS 2116-1 in FIG. 21). The first SRSspatial relation may comprise a first RS indicator/index indicating thefirst reference RS. The first reference RS may be a first SS/PBCH block.The first reference RS may be a first CSI-RS (e.g., periodic CSI-RS, SPCSI-RS, aperiodic CSI-RS). The first reference RS may be a first SRS(e.g., periodic SRS, SP SRS, aperiodic SRS).

The wireless device may perform a first SRS transmission (e.g.,send/transmit a first target SRS) for the first SRS resource with afirst spatial domain filter. The wireless device may receive the firstSS/PBCH block with a first spatial domain transmission filter. The firstspatial domain filter for the first SRS transmission may be the firstspatial domain transmission filter (e.g., used for receiving the firstSS/PBCH block), for example, if the first reference RS is the firstSS/PBCH block.

The wireless device may receive the first CSI-RS with a first spatialdomain transmission filter. The first spatial domain filter for thefirst SRS transmission may be the first spatial domain transmissionfilter (e.g., used for receiving the first CSI-RS), for example, if thefirst reference RS is the first CSI-RS.

The wireless device may send (e.g., transmit) the first SRS with a firstspatial domain transmission filter. The first spatial domain filter forthe first SRS transmission may be the first spatial domain transmissionfilter (e.g., used for transmitting the first SRS), for example, if thefirst reference RS is the first SRS.

The one or more configuration parameters may indicate SRS spatialrelations for the one or more third SRS resources. The SRS spatialrelations may be indicated/provided by a higher layer parameter (e.g.,spatialRelationInfo). Each SRS resource of the one or more third SRSresources may be indicated/configured by a respective SRS spatialrelation of the SRS spatial relations. The third SRS resource may beindicated/configured by a third SRS spatial relation. The third SRSspatial relation may indicate a third reference RS (e.g., RS 1916-3 inFIG. 19, RS 2016-3 in FIG. 20, and RS 2116-3 in FIG. 21). The third SRSspatial relation may comprise a third RS indicator/index indicating thethird reference RS. The third reference RS may be a third SS/PBCH block.The third reference RS may be a third CSI-RS (e.g., periodic CSI-RS, SPCSI-RS, aperiodic CSI-RS). The third reference RS may be a third SRS(e.g., periodic SRS, SP SRS, aperiodic SRS).

The wireless device may perform a third SRS transmission (e.g., transmita third target SRS) for the third SRS resource with a third spatialdomain filter. The wireless device may receive the third SS/PBCH blockwith a third spatial domain transmission filter. The third spatialdomain filter for the third SRS transmission may be the third spatialdomain transmission filter (e.g., used for receiving the third SS/PBCHblock), for example, if the third reference RS is the third SS/PBCHblock.

The wireless device may receive the third CSI-RS with a third spatialdomain transmission filter. The third spatial domain filter for thethird SRS transmission may be the third spatial domain transmissionfilter (e.g., used for receiving the third CSI-RS), for example, if thethird reference RS is the third CSI-RS.

The wireless device may send (e.g., transmit) the third SRS with a thirdspatial domain transmission filter. The third spatial domain filter forthe third SRS transmission may be the third spatial domain transmissionfilter (e.g., used for transmitting the third SRS), for example, if thethird reference RS is the third SRS.

The second SRS resource set may comprise one or more second SRSresources. The one or more second SRS resources may beindicated/provided by a higher layer parameter (E.g., SRS-Resource). Theone or more second SRS resources may comprise a second SRS resource.

The one or more configuration parameters may indicate SRS resourceindices for the one or more second SRS resources. The SRS resourceindices may be indicated/provided by a higher layer parameter (e.g.,SRS-ResourceId). Each SRS resource of the one or more second SRSresources may be indicated/identified by a respective SRS resource indexof the SRS resource indices. The second SRS resource may beindicated/identified by a second SRS resource index.

The one or more configuration parameters may indicate SRS resource typesfor the one or more second SRS resources. The SRS resource types may beindicated/provided by a higher layer parameter resourceType) Each SRSresource of the one or more second SRS resources may beindicated/configured by a respective one SRS resource type of the SRSresource types. The second SRS resource may be indicated/configured by asecond SRS resource type (e.g., type-2 in FIG. 19-FIG. 21). The secondSRS resource type may correspond to a periodic SRS transmission. Thesecond SRS resource type may correspond to a SP SRS transmission. Thesecond SRS resource type may correspond to an aperiodic SRStransmission.

The one or more configuration parameters may indicate SRS spatialrelations for the one or more second SRS resources. The SRS spatialrelations may be indicated/provided by a higher layer parameter (e.g.,spatialRelationInfo). Each SRS resource of the one or more second SRSresources may be indicated/configured by a respective SRS spatialrelation of the SRS spatial relations. The second SRS resource may beindicated/configured by a second SRS spatial relation. The second SRSspatial relation may indicate a second reference RS (e.g., RS 1916-2 inFIG. 19, RS 2016-2 in FIG. 20, RS 2116-2 in FIG. 21). The second SRSspatial relation may comprise a second RS indicator/index indicating thesecond reference RS. The second reference RS may be a second SS/PBCHblock. The second reference RS may be a second CSI-RS (e.g., periodicCSI-RS, SP CSI-RS, aperiodic CSI-RS). The second reference RS may be asecond SRS (e.g., periodic SRS, SP SRS, aperiodic SRS).

The wireless device may perform a second SRS transmission (e.g.,send/transmit a second target SRS) for the second SRS resource with asecond spatial domain filter. The wireless device may receive the secondSS/PBCH block with a second spatial domain transmission filter. Thesecond spatial domain filter for the second SRS transmission may be thesecond spatial domain transmission filter (e.g., used for receiving thesecond SS/PBCH block), for example, if the second reference RS is thesecond SS/PBCH block.

The wireless device may receive the second CSI-RS with a second spatialdomain transmission filter. The second spatial domain filter for thesecond SRS transmission may be the second spatial domain transmissionfilter (e.g., used for receiving the second CSI-RS), for example, if thesecond reference RS is the second CSI-RS.

The wireless device may send/transmit the second SRS with a secondspatial domain transmission filter. The second spatial domain filter forthe second SRS transmission may be the second spatial domaintransmission filter (e.g., used for transmitting the second SRS), forexample, if the second reference RS is the second SRS.

A first SRS transmission for the first SRS resource may be triggered(e.g., by the base station). The base station may request the first SRStransmission (e.g., periodic SRS, SP SRS, aperiodic SRS).

A third SRS transmission for the third SRS resource may be triggered(e.g., by the base station). The base station may request the third SRStransmission (e.g., periodic SRS, SP SRS, aperiodic SRS).

A second SRS transmission for the second SRS resource may be triggered(e.g., by the base station). The base station may request the second SRStransmission (e.g., periodic SRS, SP SRS, aperiodic SRS).

The wireless may determine that the first SRS resource of the first SRStransmission, the second SRS resource of the second SRS transmission,and the third SRS resource of the third SRS transmission overlap in atime duration. The time duration may be at least one symbol (or anyother quantity of symbols). The time duration may be at least one slot(or any other quantity of slots). The time duration may be at least onesubframe (or any other quantity of subframes). The time duration may beat least one frame (or any other quantity of frames).

The second SRS spatial relation of the second SRS resource may bedifferent (e.g., in the time duration) from the first SRS spatialrelation of the first SRS resource and the third SRS spatial relation ofthe third SRS resource. The second SRS spatial relation being differentfrom the first SRS spatial relation and the third SRS spatial relationmay comprise that the wireless device does not perform the first SRStransmission for the first SRS resource and the second SRS transmissionfor the second SRS resource simultaneously in the time duration. Thesecond SRS spatial relation being different from the first SRS spatialrelation and the third SRS spatial relation may comprise that thewireless device does not perform the third SRS transmission for thethird SRS resource and the second SRS transmission for the second SRSresource simultaneously in the time duration. The second SRS spatialrelation being different from the first SRS spatial relation and thethird SRS spatial relation may comprise that the second reference RSindicated by the second SRS spatial relation is different from the firstreference RS indicated by the first SRS spatial relation and the thirdreference RS indicated by the third SRS spatial relation. The second SRSspatial relation being different from the first SRS spatial relation andthe third SRS spatial relation may comprise that the first reference RSindicated by the first SRS spatial relation and the second reference RSindicated by the second SRS spatial relation are not QCL-ed. The secondSRS spatial relation being different from the first SRS spatial relationand the third SRS spatial relation may comprise that the third referenceRS indicated by the third SRS spatial relation and the second referenceRS indicated by the second SRS spatial relation are not QCL-ed.

The third SRS spatial relation of the third SRS resource may bedifferent from the first SRS spatial relation of the first SRS resource.The third SRS spatial relation of the third SRS resource and the firstSRS spatial relation of the first SRS resource may be the same. Thewireless device may perform the first SRS transmission for the first SRSresource and the third SRS transmission for the third SRS resourcesimultaneously in the time duration.

In FIG. 19, the first cell-specific index may be less than the secondcell-specific index. The first SRS resource set index may be less thanthe third SRS resource set index. The wireless device mayselect/prioritize an SRS spatial relation among the first SRS spatialrelation and the second SRS spatial relation based on determining thatthe first SRS resource, the second SRS resource, and the third SRSresource overlap in the time duration, and/or based on determining thatthe second SRS spatial relation is different from the first SRS spatialrelation and the third SRS spatial relation. The wireless device mayselect/prioritize the first SRS spatial relation of the first SRSresource, for example, based on the first cell-specific index being lessthan the second cell-specific index and/or the first SRS resource setindex of the first SRS resource set (e.g., comprising the first SRSresource) being less than the third SRS resource set index of the thirdSRS resource set (e.g., comprising the third SRS resource).

The first SRS resource type and the third SRS resource type may be thesame (e.g., both periodic SRS or both SP SRS or both aperiodic SRS). Thefirst SRS resource type may correspond to an aperiodic SRS transmission.The third SRS resource type may correspond to the aperiodic SRStransmission, for example, based on the first SRS resource type and thethird SRS resource type being the same. The second SRS resource type maycorrespond to a periodic SRS transmission. The second SRS resource typemay correspond to a SP SRS transmission. The aperiodic SRS transmissionmay have a higher priority than the periodic SRS transmission. Theaperiodic SRS transmission may have a higher priority than the SP SRStransmission. The first SRS resource type and the third SRS resourcetype may have a higher priority than the second SRS resource type, forexample, based on the aperiodic SRS transmission having a higherpriority than the periodic SRS transmission. The first SRS resource typeand the third SRS resource type may have a higher priority than thesecond SRS resource type, for example, based on the aperiodic SRStransmission having a higher priority than the SP SRS transmission.

The first SRS resource type and the third SRS resource type may be thesame (e.g., both periodic SRS, both SP SRS, both aperiodic SRS). Thefirst SRS resource type may correspond to an SP SRS transmission. Thethird SRS resource type may be the SP SRS transmission, for example,based on the first SRS resource type and the third SRS resource typebeing the same. The second SRS resource type may correspond to aperiodic SRS transmission. The SP SRS transmission may have a higherpriority than the periodic SRS transmission. The first SRS resource typeand the third SRS resource type may have a higher priority the secondSRS resource type, for example, based on the SP SRS transmission havinga higher priority than the periodic SRS transmission.

In FIG. 20, the first SRS resource set index may be lower than the thirdSRS resource set index. The wireless device may select/prioritize an SRSspatial relation, among the first SRS spatial relation and the secondSRS spatial relation, based on the determining that the first SRSresource, the second SRS resource and the third SRS resource overlap inthe time duration, and/or the second SRS spatial relation is differentfrom the first SRS spatial relation and the third SRS spatial relation.The wireless device may prioritize the first SRS spatial relation of thefirst SRS resource, for example, based on the first SRS resource setindex being lower than the second SRS resource set index, and/or thefirst SRS resource type of the first SRS resource and the third SRSresource type of the third SRS resource having a higher priority thesecond SRS resource type of the second SRS resource. The first SRSresource type and the third SRS resource type may be the same or may bedifferent.

In FIG. 21, the first cell-specific index may be less than the secondcell-specific index. The first SRS resource set index may be less thanthe third SRS resource set index. The first SRS resource type, thesecond SRS resource type and the third SRS resource type may be the same(e.g., all periodic SRS or all SP SRS or all aperiodic SRS). Thewireless device may prioritize an SRS spatial relation, among the firstSRS spatial relation and the second SRS spatial relation, based on thedetermining that the first SRS resource, the second SRS resource and thethird SRS resource overlap in the time duration, and the second SRSspatial relation is different from the first SRS spatial relation andthe third SRS spatial relation. The wireless device may prioritize thefirst SRS spatial relation of the first SRS resource, for example, basedon in response to the first cell-specific index being lower than thesecond cell-specific index and the first SRS resource set index of thefirst SRS resource set (e.g., comprising the first SRS resource) beingless than the third SRS resource set index of the third SRS resource set(e.g., comprising the third SRS resource). The first SRS resource type,the second SRS resource type, and the third SRS resource type may be thesame or may be different.

The selecting/prioritizing the first SRS spatial relation of the firstSRS resource may comprise, for example, the wireless device performingthe second SRS transmission for the second SRS resource with the firstSRS spatial relation of the first SRS resource (e.g., on the first cell)in the time duration. The performing the second SRS transmission for thesecond SRS resource with the first SRS spatial relation may comprise,for example, the wireless device transmitting the second SRS resourcewith the first spatial domain filter (e.g., of the first SRStransmission for the first SRS resource) in the time duration. Theperforming the second SRS transmission for the second SRS resource withthe first SRS spatial relation may comprise, for example, the wirelessdevice applying/using the first spatial domain filter (e.g., of thefirst SRS transmission for the first SRS resource) for the second SRStransmission in the time duration.

The selecting/prioritizing the first SRS spatial relation of the firstSRS resource may comprise that the first SRS spatial relation of thefirst SRS resource (e.g., on the first cell) overrides the second SRSspatial relation of the second SRS resource in the time duration. Theprioritizing the first SRS spatial relation of the first SRS resourcemay comprise, for example, the wireless device performing the third SRStransmission for the third SRS resource with the third SRS spatialrelation of the third SRS resource in the time duration. The performingthe third SRS transmission for the third SRS resource with the third SRSspatial relation may comprise, for example, the wireless devicetransmitting the third SRS resource with the third spatial domain filter(e.g., of the third SRS transmission for the third SRS resource) in thetime duration. The performing the third SRS transmission for the thirdSRS resource with the third SRS spatial relation may comprise, forexample, the wireless device applying/using the third spatial domainfilter (e.g., of the third SRS transmission for the third SRS resource)for the third SRS transmission in the time duration.

The selecting/prioritizing the first SRS spatial relation of the firstSRS resource may comprise, for example, the wireless device performingthe first SRS transmission for the first SRS resource with the first SRSspatial relation of the first SRS resource in the time duration. Theperforming the first SRS transmission for the first SRS resource withthe first SRS spatial relation may comprise, for example, the wirelessdevice transmitting the first SRS resource with the first spatial domainfilter (e.g., of the first SRS transmission for the first SRS resource)in the time duration. The performing the first SRS transmission for thefirst SRS resource with the first SRS spatial relation may comprise, forexample, the wireless device applying/using the first spatial domainfilter (e.g., of the first SRS transmission for the first SRS resource)for the first SRS transmission in the time duration.

The prioritizing the first SRS spatial relation of the first SRSresource may comprise, for example, the wireless device dropping thesecond SRS transmission for the second SRS resource. The prioritizingthe first SRS spatial relation of the first SRS resource may comprise,for example, the wireless device dropping the second SRS transmissionfor the second SRS resource at least in the time duration. The droppingthe second SRS transmission may comprise, for example, stopping thesecond SRS transmission. The dropping the second SRS transmission maycomprise, for example, not initiating the second SRS transmission. Thedropping the second SRS transmission may comprise, for example, notperforming the second SRS transmission for the second SRS resource inthe time duration. The dropping the second SRS transmission maycomprise, for example, not transmitting the second SRS resource in thetime duration. The dropping the second SRS transmission may comprise,for example, performing the first SRS transmission for the first SRSresource and the third SRS transmission for the third SRS resource inthe time duration.

The one or more configuration parameters may indicate that a higherlayer parameter (e.g., usage) is set to a value/indication (e.g.,BeamManagement) for the first SRS resource set. The one or moreconfiguration parameters may indicate that a higher layer parameter(e.g., usage) is set to a value/indication (e.g., codebook) for thefirst SRS resource set. The one or more configuration parameters mayindicate that a higher layer parameter (e.g., usage) is set to avalue/indication (e.g., nonCodebook) for the first SRS resource set. Theone or more configuration parameters may indicate that a higher layerparameter (e.g., usage) is set to a value/indication (e.g.,antennaSwitching) for the first SRS resource set.

The one or more configuration parameters may indicate that a higherlayer parameter (e.g., usage) is set to a value/indication (e.g.,BeamManagement) for the second SRS resource set. The one or moreconfiguration parameters may indicate that a higher layer parameter(e.g., usage) is set to a value/indication (e.g., codebook) for thesecond SRS resource set. The one or more configuration parameters mayindicate that a higher layer parameter (e.g., usage) is set to avalue/indication (e.g., nonCodebook) for the second SRS resource set.The one or more configuration parameters may indicate that a higherlayer parameter (e.g., usage) is set to a value/indication (e.g.,antennaSwitching) for the second SRS resource set.

The one or more configuration parameters may indicate that a higherlayer parameter (e.g., usage) is set to a value/indication (e.g.,BeamManagement) for the third SRS resource set. The one or moreconfiguration parameters may indicate that a higher layer parameter(e.g., usage) is set to a value/indication (e.g., codebook) for thethird SRS resource set. The one or more configuration parameters mayindicate that a higher layer parameter (e.g., usage) is set to avalue/indication (e.g., nonCodebook) for the third SRS resource set. Theone or more configuration parameters may indicate that a higher layerparameter (e.g., usage) is set to a value/indication (e.g.,antennaSwitching) for the third SRS resource set.

The wireless device may determine/select a cell (e.g., a selected cell)among the first cell and the second cell (e.g., based on one or morecriteria), for example, based on determining that the first SRS resourceof the first SRS transmission for the first cell, the second SRSresource of the second SRS transmission for the second cell, and thethird SRS resource of the third SRS transmission for the first celloverlap in the time duration, and/or based on the second SRS spatialrelation being different from the first SRS spatial relation and thethird SRS spatial relation. The one or more criteria may be based on avalue of a cell-specific index. The determining/selecting may comprise,for example, determining/selecting a cell with a least/lowestcell-specific index among the first cell-specific index of the firstcell and the second cell-specific index of the second cell. The firstcell-specific index may be less/lower than the second cell-specificindex. The wireless device may determine/select the first cell as theselected cell, for example, based on the first cell-specific index beingless/lower than the second cell-specific index. The first cell-specificindex may be greater/higher than the second cell-specific index. Thewireless device may determine/select the second cell as the selectedcell, for example, based on the first cell-specific index beinggreater/higher than the second cell-specific index.

The one or more criteria may be based on a value of a cell-specificindex. The selecting may comprise, for example, determining/selecting acell with a greatest/highest cell-specific index among the firstcell-specific index of the first cell and the second cell-specific indexof the second cell. The first cell-specific index may be greater/higherthan the second cell-specific index. In The wireless device maydeterming/select the first cell as the selected cell, for example, basedon the first cell-specific index being greater/higher than the secondcell-specific index. The first cell-specific index may be less/lowerthan the second cell-specific index. The wireless device maydetermine/select the second cell as the selected cell, for example,based on the first cell-specific index being less/lower than the secondcell-specific index.

The one or more criteria may be based on a SRS resource typeThe firstSRS resource type and the third SRS resource type may be the same (e.g.,both periodic SRS or both SP SRS or both aperiodic SRS). The selectingmay comprise determining/selecting a cell associated with an SRSresource type having a highest priority among the first SRS resourcetype (and/or the third SRS resource type) of the first cell and thesecond SRS resource type of the second cell. The first SRS resource typemay correspond to an aperiodic SRS transmission. The second SRS resourcetype may correspond to a periodic SRS transmission or an SP SRStransmission The aperiodic SRS transmission may have a higher prioritythan the periodic SRS transmission. The aperiodic SRS transmission mayhave a higher priority than the SP SRS transmission. The first SRSresource type may have a higher priority than the second SRS resourcetype, for example, based on the aperiodic SRS transmission having ahigher priority than the periodic SRS transmission. The first SRSresource type may have a higher priority than the second SRS resourcetype, for example, based on the aperiodic SRS transmission having ahigher priority than the SP SRS transmission. The wireless device maydetermine/select the first cell, associated with the first SRS resourcetype, as the selected cell, for example, based on the first SRS resourcetype having the higher priority than the second SRS resource type.

The one or more criteria may be based on a SRS resource type. The firstSRS resource type and the third SRS resource type may be the same (e.g.,both periodic SRS or both SP SRS or both aperiodic SRS). Thedetermining/selecting may comprise determining/selecting a cellassociated with an SRS resource type having a highest priority among thefirst SRS resource type (and/or the third SRS resource type) of thefirst cell and the second SRS resource type of the second cell. Thefirst SRS resource type may correspond to a SP SRS transmission. Thesecond SRS resource type may correspond to a periodic SRS transmission.The SP SRS transmission may have a higher priority than the periodic SRStransmission. The first SRS resource type may have a higher prioritythan the second SRS resource type, for example, based on the SP SRStransmission having a higher priority than the periodic SRStransmission. The wireless device may determine/select the first cell,associated with the first SRS resource type, as the selected cell, forexample, based on the first SRS resource type having the higher prioritythan the second SRS resource type.

The one or more criteria may be based on a SRS resource type and a valueof a cell-specific index. The determining/selecting may comprisedetermining/selecting a cell with a lowest cell-specific index among aplurality of cells (e.g., first cell, second cell), and associated withan SRS resource type (e.g., first SRS resource type, second SRS resourcetype) having a highest priority among plurality of SRS resource types ofthe plurality of cells. A first cell-specific index of a first cell ofthe plurality of cells may be less/lower than a second cell-specificindex of a second cell of the plurality of cells and a thirdcell-specific index of a third cell of the plurality of cells. Thesecond cell-specific index of the second cell may be less/lower than thethird cell-specific index of the third cell. A second SRS resource typeof the second cell may have a higher priority than a first SRS resourcetype of the first cell. A third SRS resource type of the third cell mayhave a higher priority than the first SRS resource type of the firstcell. The second SRS resource type of the second cell and the third SRSresource type of the third cell may be the same (e.g. have the samepriority). The wireless device may determine/select the second cell asthe selected cell, for example, based on the second cell-specific indexbeing lower than the third cell-specific index.

The first SRS resource set index of the first SRS resource setcomprising the first SRS resource may be lower (or higher) than thethird SRS resource set index of the third SRS resource set comprisingthe third SRS resource. The selected cell may be the first cell. Thewireless device may determine the first SRS resource set index is lower(or higher) than the third SRS resource set index, for example, based onthe selected cell being the first cell. The wireless device mayprioritize the first SRS spatial relation of the first SRS resource, forexample, based on the determining.

The wireless device may be equipped with one or more antenna panels(e.g., for uplink transmission). The wireless device may perform thefirst SRS transmission for the first SRS resource from a first antennapanel of the one or more antenna panels. The wireless device may performthe third SRS transmission for the third SRS resource from a secondantenna panel of the one or more antenna panels.

The one or more configuration parameters may indicate panel-specificindices (e.g., indicated/provided by a higher layer parameter) for theone or more antenna panels. Each antenna panel of the one or moreantenna panels may be indicated/identified by a respectivepanel-specific index of the panel-specific indices. The first antennapanel may be indicated/identified by a first panel-specific index. Thesecond antenna panel may be indicated/identified by a secondpanel-specific index.

The first panel-specific index associated with the first SRS resourcemay be less/lower (or greater/higher) than the second panel-specificindex associated with the third SRS resource. The determined/selectedcell may be the first cell. The wireless device may determine that thefirst panel-specific index is less/lower (or greater/higher) than thesecond panel-specific index, for example, based on the selected cellbeing the first cell. The wireless device may prioritize the first SRSspatial relation of the first SRS resource, for example, based on thedetermining.

FIG. 22 shows an example method for selecting/prioritizing an SRSspatial relation for an SRS transmission. At step 2205, the wirelessdevice may receive one or more RRC configuration messages. The one ormore RRC configuration messages may comprise one or more configurationparameters of a plurality of cells. At step 2210, the wireless devicemay determine that at least two first SRS transmissions for at least twocells overlap (e.g., in time). An SRS transmission for a first cell mayoverlap in time with an SRS transmission for a second cell. At step2215, the wireless device may determine/select a cell (e.g., a selectedcell), of the plurality of cells. The cell (e.g., selected cell) mayhave a lowest cell index among the plurality of cells. At step 2220, thewireless device may determine that at least two second SRS transmissionsfor the cell (e.g., selected cell) overlap in time. At step 2225, thewireless device may select one or more SRS transmissions, among the atleast two second SRS transmissions, which have the highest priority. Anaperiodic SRS transmission may have a higher priority than an SP SRStransmission. An SP SRS transmission may have a higher priority than aperodic SRS transmission. At step 2230, the wireless device maydetermine/select an SRS transmission (e.g., a selected SRStransmission), among the one or more SRS transmissions, that isassociated with the lowest SRS resource index. At step 2235, thewireless device may prioritize an SRS spatial relation of the SRStransmission (e.g., selected SRS transmission). The prioritizing the SRSspatial relation of the SRS transmission (e.g., selected SRStransmission) may comprise, for example, the wireless device performingan SRS transmission in another cell (e.g., different from the selectedcell) with the SRS spatial relation.

FIG. 23 shows an example method for selecting/prioritizing an SRSspatial relation for an SRS transmission. At step 2305, the wirelessdevice may receive one or more RRC configuration messages. The one ormore RRC configuration messages may comprise one or more configurationparameters of a plurality of cells. At step 2310, the wireless devicemay determine that at least two first SRS transmissions for at least twocells overlap (e.g., in time). An SRS transmission for a first cell mayoverlap in time with an SRS transmission for a second cell. At step2315, the wireless device may determine/select one or more SRStransmissions, among the at least two first SRS transmissions, with thehighest priority. An aperiodic SRS transmission may have a higherpriority than an SP SRS transmission. An SP SRS transmission may have ahigher priority than a perodic SRS transmission. At step 2320, thewireless device may determine one or more cells, among the at least twocells, that are associated with the one or more SRS transmissions. Thewireless device may determine/select a cell (e.g., a selected cell),among the one or more cells, with the lowest cell index. At step 2325,the wireless device may determine that at least two second SRStransmissions for the cell (e.g., selected cell) overlap in time. Atstep 2330, the wireless device may determine/select an SRS transmission(e.g., selected SRS transmission), among the at least two second SRStransmissions, that is associated with the lowest SRS resource index. Atstep 2335, the wireless device may prioritize an SRS spatial relation ofthe SRS transmission (e.g., selected SRS transmission). The prioritizingthe SRS spatial relation of the SRS transmission (e.g., selected SRStransmission) may comprise, for example, the wireless device performingan SRS transmission in another cell (e.g., different from the selectedcell) with the SRS spatial relation.

FIG. 24 shows an example method for selecting/prioritizing an SRSspatial relation for an SRS transmission. At step 2405, the wirelessdevice may receive one or more RRC configuration messages. The one ormore RRC configuration messages may comprise one or more configurationparameters of a plurality of cells. At step 2410, the wireless devicemay determine that at least two first SRS transmissions for at least twocells overlap (e.g., in time). An SRS transmission for a first cell mayoverlap in time with an SRS transmission for a second cell. At step2415, the wireless device may determine/select one or more SRStransmissions, among the at least two first SRS transmissions, with thehighest priority. An aperiodic SRS transmission may have a higherpriority than an SP SRS transmission. An SP SRS transmission may have ahigher priority than a perodic SRS transmission. At step 2420, thewireless device may determine one or more cells, among the at least twocells, that are associated with the one or more SRS transmissions. Thewireless device may determine/select a cell (e.g., selected cell), amongthe one or more cells, with the lowest cell index. At step 2425, thewireless device may determine that at least two second SRS transmissionsfor the cell (e.g., selected cell) overlap in time. At step 2430, thewireless device may determine/select an SRS transmission, among the atleast two second SRS transmissions, that is associated with the lowestantenna panel index. At step 2435, the wireless device may prioritize anSRS spatial relation of the SRS transmission (e.g., selected SRStransmission). The prioritizing the SRS spatial relation of the SRstransmission (e.g., selected SRS transmission) may comprise, forexample, the wireless device performing an SRS transmission in anothercell (e.g., different from the selected cell) with the SRS spatialrelation.

FIG. 25 shows an example method for selecting/prioritizing an SRSspatial relation for an SRS transmission. At step 2505, the wirelessdevice may receive one or more RRC configuration messages. The one ormore RRC configuration messages may comprise one or more configurationparameters of a plurality of cells. At step 2510, a first SRStransmission for a first cell may be triggered (e.g., by a basestation). At step 2520, the wireless device may perform the first SRStransmission (e.g., with the first spatial transmission filter) if thefirst SRS transmission does not overlap with at least two SRStransmissions for the second cell. At step 2525, the wireless device maydetermine/select a cell (e.g., selected cell) among the first cell andthe second cell based on one or more criteria, for example, if the firstSRS transmission overlaps with at least two SRS transmissions for thesecond cell. The one or more criteria may be based on for example, cellindices, SRS transmission priorities, etc. The wireless device maydetermine/select a cell, among the first cell and the second cell, witha lowest cell index. At step 2535, the wireless device may perform thefirst SRS transmission and the at least two SRS transmissions with thefirst spatial transmission filter, for example, if the cell (e.g.,selected cell) is not the second cell. At step 2540, the wireless devicemay determine/select an SRS transmission (e.g., selected SRStransmission), among the at least two SRS transmissions, with the lowestSRS resource set, for example, if the cell (e.g., selected cell) is thesecond cell. At step 2545, the wireless device may perform the first SRStransmission with a spatial transmission filter of the selected SRStransmission.

FIG. 26 shows an example method for selecting/prioritizing an SRSspatial relation for an SRS transmission. At step 2605, the wirelessdevice may receive one or more RRC configuration messages. The one ormore RRC configuration messages may comprise one or more configurationparameters of a plurality of cells. At step 2610, a first SRStransmission for a first cell may be triggered (e.g., by a basestation). At step 2620, the wireless device may perform the first SRStransmission (e.g., with the first spatial transmission filter) if thefirst SRS transmission does not overlap with at least two SRStransmissions for the second cell. At step 2625, the wireless device maydetermine/select a cell (e.g., selected cell) among the first cell andthe second cell based on one or more criteria, for example, if the firstSRS transmission overlaps with at least two SRS transmissions for thesecond cell. The one or more criteria may be based on for example, cellindices, SRS transmission priorities, etc. The wireless device maydetermine/select a cell, among the first cell and the second cell, witha lowest cell index. At step 2635, the wireless device may perform thefirst SRS transmission and the at least two SRS transmissions with thefirst spatial transmission filter, for example, if the cell (e.g.,selected cell) is not the second cell. At step 2640, the wireless devicemay determine/select an SRS transmission (e.g., selected SRStransmission), among the at least two SRS transmissions, with the lowestantenna panel index, for example, if the cell (e.g., selected cell) isthe second cell. At step 2645, the wireless device may perform the firstSRS transmission with a spatial transmission filter of the selected SRStransmission.

A wireless device may perform a method comprising multiple operations.The wireless device may determine that a first sounding reference signal(SRS) resource of a first cell and a second SRS resource of the firstcell overlap with a third SRS resource of a second cell. The wirelessdevice may determine that a first spatial transmission filter of thefirst SRS resource and a second spatial transmission filter of thesecond SRS resource are different from a third spatial transmissionfilter of the third SRS resource. The wireless device may, based on thedetermining that the first SRS resource of the first cell and the secondSRS resource of the first cell overlap with the third SRS resource ofthe second cell, and based on the determining that the first spatialtransmission filter of the first SRS resource and the second spatialtransmission filter of the second SRS resource are different from thethird spatial transmission filter of the third SRS resource, select aspatial transmission filter from the first spatial transmission filteror the second spatial transmission filter. The wireless device maytransmit via the selected spatial transmission filter, an SRS for thethird SRS resource.

The wireless device may also perform one or more additional operations.The transmitting the SRS via the selected spatial transmission filtermay be for estimating a channel associated with the third SRS resourcethat overlaps with the first SRS resource and the second SRS resource.The first SRS resource, the second SRS resource, and the third SRSresource may overlap in a time duration. The time duration may compriseat least one of: a symbol; a slot; a transmission time interval; asubframe; and a frame. The selecting the spatial filter may be based onat least one of: a first cell index of the first cell being less than asecond cell index of the second cell; or the first cell index of thefirst cell being greater than the second cell index of the second cell.The selecting the spatial transmission filter may be based on a firstSRS resource set index of a first SRS resource set comprising the firstSRS resource and a second SRS resource set index of a second SRSresource set comprising the second SRS resource. The selecting thespatial transmission filter may be based on at least one of a first SRSresource type of the first SRS resource and a second SRS resource typeof the second SRS resource having a higher priority than a third SRSresource type of the third SRS resource. The first SRS resource may beassociated with a first antenna panel, wherein the first antenna panelis indicated by a first antenna panel index. The second SRS resource maybe associated with a second antenna panel, wherein the second antennapanel is indicated by a second antenna panel index. The transmitting thethird SRS via the selected spatial transmission filter may be based onthe first antenna panel index and the second antenna panel index. Thewireless device may drop a transmission of an SRS for a fourth SRSresource of the second cell, based on determining that a fifth SRSresource of the first cell and a sixth SRS resource of the first celloverlap with the fourth SRS resource of the second cell. The wirelessdevice may drop a transmission of an SRS for a fourth SRS resource ofthe second cell, based on determining that a fifth spatial transmissionfilter of the fifth SRS resource and a sixth spatial transmission filterof the sixth SRS resource are different from a fourth spatialtransmission filter of the fourth SRS resource.

Systems, devices and media may be configured with the method. Acomputing device may comprise one or more processors; and memory storinginstructions that, when executed, cause the computing device to performthe described method, additional operations and/or include theadditional elements. A system may comprise a first computing deviceconfigured to perform the described method, additional operations and/orinclude the additional elements; and a second computing deviceconfigured to receive the SRS for the third SRS resource. Acomputer-readable medium may store instructions that, when executed,cause performance of the described method, additional operations and/orinclude the additional elements.

A wireless device may perform a method comprising multiple operations.The wireless device may receive one or more configuration parameters ofa first cell and a second cell. The wireless device may determine that afirst sounding reference signal (SRS) transmission for a first SRSresource of the first cell and a second SRS transmission for a secondSRS resource of the first cell overlap a third SRS transmission for athird SRS resource of the second cell The wireless device may determinethat a first spatial transmission filter of the first SRS transmissionand a second spatial transmission filter of the second SRS transmissionare different from a third spatial transmission filter of the third SRStransmission. The wireless device may transmit via one of the firstspatial transmission filter or the second spatial transmission filter,based on the determining that the first SRS transmission and the secondSRS transmission overlap the third SRS transmission, and based on thedetermining that the first spatial transmission filter and the secondspatial transmission filter are different from the third spatialtransmission filter, the third SRS transmission.

The wireless device may also perform one or more additional operations.The one or more configuration parameters may comprise at least one of afirst index of the first cell and a second index of the second cell. Theone or more configuration parameters may comprise at least one of afirst SRS spatial relation associated with the first SRS transmission, asecond SRS spatial relation associated with the second SRS transmission,and a third SRS spatial relation associated with a third SRStransmission. The transmitting the third SRS transmission may be basedon at least one of the first SRS transmission and the second SRStransmission having a higher priority than the third SRS transmission.The transmitting the third SRS transmission may be based on a first SRSresource set index associated with the first SRS resource and a secondSRS resource set index associated with the second SRS resource. Thefirst SRS transmission may be associated with a first antenna panel,wherein the first antenna panel is indicated by a first antenna panelindex. The second SRS transmission may be associated with a secondantenna panel, wherein the second antenna panel is indicated by a secondantenna panel index. The transmitting the third SRS transmission may bebased on the first antenna panel index and the second antenna panelindex. The wireless device may drop a fourth SRS transmission of thesecond cell, based on determining, by the wireless device, that a fifthSRS transmission of the first cell and a sixth SRS transmission of thefirst cell overlap with the fourth SRS transmission of the second cell.The wireless device may drop a fourth SRS transmission of the secondcell, based on determining, by the wireless device, that a fifth spatialtransmission filter of the fifth SRS transmission and a sixth spatialtransmission filter of the sixth SRS transmission are different from afourth spatial transmission filter of the fourth SRS transmission. Thefirst spatial transmission filter and the second spatial transmissionfilter may be different.

Systems, devices and media may be configured with the method. Acomputing device may comprise one or more processors; and memory storinginstructions that, when executed, cause the computing device to performthe described method, additional operations and/or include theadditional elements. A system may comprise a first computing deviceconfigured to perform the described method, additional operations and/orinclude the additional elements; and a second computing deviceconfigured to receive the third SRS transmission. A computer-readablemedium may store instructions that, when executed, cause performance ofthe described method, additional operations and/or include theadditional elements.

A wireless device may perform a method comprising multiple operations.The wireless device may transmit via a first spatial transmission filterof a first sounding reference signal (SRS) resource of a first cell, afirst SRS. The wireless device may transmit via a second spatialtransmission filter of a second SRS resource of the first cell, a secondSRS. The wireless devie may transmit via one of the first spatialtransmission filter or the second spatial transmission filter, based ondetermining that the first SRS resource and the second SRS resourceoverlap with a third SRS resource of a second cell, and based ondetermining that the first spatial transmission filter and the secondspatial transmission filter are different from a third spatialtransmission filter of a third SRS of the second cell, the third SRS.

The wireless device may also perform one or more additional operations.The transmitting the third SRS may be based on at least one of the firstSRS and the second SRS having a higher priority than the third SRS. Thetransmitting the third SRS may be based on a first SRS resource setindex of a first SRS resource set comprising the first SRS resource anda second SRS resource set index of a first SRS resource set comprisingthe second SRS resource. The first SRS resource may be associated with afirst antenna panel, wherein the first antenna panel is indicated by afirst antenna panel index. The second SRS resource may be associatedwith a second antenna panel, wherein the second antenna panel isindicated by a second antenna panel index. The transmitting the thirdSRS may be based on the first antenna panel index and the second antennapanel index. The wireless device may drop a transmission of a fourth SRSfor a fourth SRS resource of the second cell, based on determining, bythe wireless device, that a fifth SRS resource of the first cell and asixth SRS resource of the first cell overlap with the fourth SRSresource of the second cell. The wireless device may drop a transmissionof a fourth SRS for a fourth SRS resource of the second cell, based ondetermining, by the wireless device, that a fifth spatial transmissionfilter of the first SRS resource and a sixth spatial transmission filterof the sixth SRS resource are different from a fourth spatialtransmission filter of the fourth SRS resource. The first spatialtransmission filter and the second spatial transmission filter may bedifferent.

Systems, devices and media may be configured with the method. Acomputing device may comprise one or more processors; and memory storinginstructions that, when executed, cause the computing device to performthe described method, additional operations and/or include theadditional elements. A system may comprise a first computing deviceconfigured to perform the described method, additional operations and/orinclude the additional elements; and a second computing deviceconfigured to receive the third SRS. A computer-readable medium maystore instructions that, when executed, cause performance of thedescribed method, additional operations and/or include the additionalelements.

FIG. 27 shows example elements of a computing device that may be used toimplement any of the various devices described herein, including, e.g.,the base station 120A and/or 120B, the wireless device 110 (e.g., 110Aand/or 110B), or any other base station, wireless device, or computingdevice described herein. The computing device 2700 may include one ormore processors 2701, which may execute instructions stored in therandom-access memory (RAM) 2703, the removable media 2704 (such as aUniversal Serial Bus (USB) drive, compact disk (CD) or digital versatiledisk (DVD), or floppy disk drive), or any other desired storage medium.Instructions may also be stored in an attached (or internal) hard drive2705. The computing device 2700 may also include a security processor(not shown), which may execute instructions of one or more computerprograms to monitor the processes executing on the processor 2701 andany process that requests access to any hardware and/or softwarecomponents of the computing device 2700 (e.g., ROM 2702, RAM 2703, theremovable media 2704, the hard drive 2705, the device controller 2707, anetwork interface 2709, a GPS 2711, a Bluetooth interface 2712, a WiFiinterface 2713, etc.). The computing device 2700 may include one or moreoutput devices, such as the display 2706 (e.g., a screen, a displaydevice, a monitor, a television, etc.), and may include one or moreoutput device controllers 2707, such as a video processor. There mayalso be one or more user input devices 2708, such as a remote control,keyboard, mouse, touch screen, microphone, etc. The computing device2700 may also include one or more network interfaces, such as a networkinterface 2709, which may be a wired interface, a wireless interface, ora combination of the two. The network interface 2709 may provide aninterface for the computing device 2700 to communicate with a network2710 (e.g., a RAN, or any other network). The network interface 2709 mayinclude a modem (e.g., a cable modem), and the external network 2710 mayinclude communication links, an external network, an in-home network, aprovider's wireless, coaxial, fiber, or hybrid fiber/coaxialdistribution system (e.g., a DOCSIS network), or any other desirednetwork. Additionally, the computing device 2700 may include alocation-detecting device, such as a global positioning system (GPS)microprocessor 2711, which may be configured to receive and processglobal positioning signals and determine, with possible assistance froman external server and antenna, a geographic position of the computingdevice 2700.

The example in FIG. 27 may be a hardware configuration, although thecomponents shown may be implemented as software as well. Modificationsmay be made to add, remove, combine, divide, etc. components of thecomputing device 2700 as desired. Additionally, the components may beimplemented using basic computing devices and components, and the samecomponents (e.g., processor 2701, ROM storage 2702, display 2706, etc.)may be used to implement any of the other computing devices andcomponents described herein. For example, the various componentsdescribed herein may be implemented using computing devices havingcomponents such as a processor executing computer-executableinstructions stored on a computer-readable medium, as shown in FIG. 27.Some or all of the entities described herein may be software based, andmay co-exist in a common physical platform (e.g., a requesting entitymay be a separate software process and program from a dependent entity,both of which may be executed as software on a common computing device).

The disclosed mechanisms herein may be performed if certain criteria aremet, for example, in a wireless device, a base station, a radioenvironment, a network, a combination of the above, and/or the like.Example criteria may be based on, for example, wireless device and/ornetwork node configurations, traffic load, initial system set up, packetsizes, traffic characteristics, a combination of the above, and/or thelike. If the one or more criteria are met, various examples may be used.It may be possible to implement examples that selectively implementdisclosed protocols.

A base station may communicate with a mix of wireless devices. Wirelessdevices and/or base stations may support multiple technologies, and/ormultiple releases of the same technology. Wireless devices may have somespecific capability(ies) depending on wireless device category and/orcapability(ies). A base station may comprise multiple sectors. A basestation communicating with a plurality of wireless devices may refer tobase station communicating with a subset of the total wireless devicesin a coverage area. Wireless devices referred to herein may correspondto a plurality of wireless devices of a particular LTE or 5G releasewith a given capability and in a given sector of a base station. Aplurality of wireless devices may refer to a selected plurality ofwireless devices, and/or a subset of total wireless devices in acoverage area. Such devices may operate, function, and/or perform basedon or according to drawings and/or descriptions herein, and/or the like.There may be a plurality of base stations or a plurality of wirelessdevices in a coverage area that may not comply with the disclosedmethods, for example, because those wireless devices and/or basestations perform based on older releases of LTE or 5G technology.

One or more features described herein may be implemented in acomputer-usable data and/or computer-executable instructions, such as inone or more program modules, executed by one or more computers or otherdevices. Generally, program modules include routines, programs, objects,components, data structures, etc. that perform particular tasks orimplement particular abstract data types when executed by a processor ina computer or other data processing device. The computer executableinstructions may be stored on one or more computer readable media suchas a hard disk, optical disk, removable storage media, solid statememory, RAM, etc. The functionality of the program modules may becombined or distributed as desired. The functionality may be implementedin whole or in part in firmware or hardware equivalents such asintegrated circuits, field programmable gate arrays (FPGA), and thelike. Particular data structures may be used to more effectivelyimplement one or more features described herein, and such datastructures are contemplated within the scope of computer executableinstructions and computer-usable data described herein.

Many of the elements in examples may be implemented as modules. A modulemay be an isolatable element that performs a defined function and has adefined interface to other elements. The modules may be implemented inhardware, software in combination with hardware, firmware, wetware(i.e., hardware with a biological element) or a combination thereof, allof which may be behaviorally equivalent. For example, modules may beimplemented as a software routine written in a computer languageconfigured to be executed by a hardware machine (such as C, C++,Fortran, Java, Basic, Matlab or the like) or a modeling/simulationprogram such as Simulink, Stateflow, GNU Octave, or Lab VIEWMathScript.Additionally or alternatively, it may be possible to implement modulesusing physical hardware that incorporates discrete or programmableanalog, digital and/or quantum hardware. Examples of programmablehardware may comprise: computers, microcontrollers, microprocessors,application-specific integrated circuits (ASICs); field programmablegate arrays (FPGAs); and complex programmable logic devices (CPLDs).Computers, microcontrollers, and microprocessors may be programmed usinglanguages such as assembly, C, C++ or the like. FPGAs, ASICs, and CPLDsmay be programmed using hardware description languages (HDL), such asVHSIC hardware description language (VHDL) or Verilog, which mayconfigure connections between internal hardware modules with lesserfunctionality on a programmable device. The above-mentioned technologiesmay be used in combination to achieve the result of a functional module.

A non-transitory tangible computer readable media may compriseinstructions executable by one or more processors configured to causeoperations of multi-carrier communications described herein. An articleof manufacture may comprise a non-transitory tangible computer readablemachine-accessible medium having instructions encoded thereon forenabling programmable hardware to cause a device (e.g., a wirelessdevice, wireless communicator, a wireless device, a base station, andthe like) to allow operation of multi-carrier communications describedherein. The device, or one or more devices such as in a system, mayinclude one or more processors, memory, interfaces, and/or the like.Other examples may comprise communication networks comprising devicessuch as base stations, wireless devices or user equipment (wirelessdevice), servers, switches, antennas, and/or the like. A network maycomprise any wireless technology, including but not limited to,cellular, wireless, WiFi, 4G, 5G, any generation of 3GPP or othercellular standard or recommendation, wireless local area networks,wireless personal area networks, wireless ad hoc networks, wirelessmetropolitan area networks, wireless wide area networks, global areanetworks, space networks, and any other network using wirelesscommunications. Any device (e.g., a wireless device, a base station, orany other device) or combination of devices may be used to perform anycombination of one or more of steps described herein, including, forexample, any complementary step or steps of one or more of the abovesteps.

Although examples are described above, features and/or steps of thoseexamples may be combined, divided, omitted, rearranged, revised, and/oraugmented in any desired manner Various alterations, modifications, andimprovements will readily occur to those skilled in the art. Suchalterations, modifications, and improvements are intended to be part ofthis description, though not expressly stated herein, and are intendedto be within the spirit and scope of the descriptions herein.Accordingly, the foregoing description is by way of example only, and isnot limiting.

What is claimed is:
 1. A method comprising: selecting, by a wirelessdevice, a spatial transmission filter from a first spatial transmissionfilter of a first sounding reference signal (SRS) resource of a firstcell and a second spatial transmission filter of a second SRS resourceof the first cell, wherein the selecting is based on: the first SRSresource of the first cell and the second SRS resource of the first celloverlapping with a third SRS resource of a second cell; and the firstspatial transmission filter of the first SRS resource and the secondspatial transmission filter of the second SRS resource being differentfrom a third spatial transmission filter of the third SRS resource; andtransmitting, by the wireless device via the selected spatialtransmission filter, an SRS for the third SRS resource.
 2. The method ofclaim 1, wherein the transmitting the SRS via the selected spatialtransmission filter is for estimating a channel associated with thethird SRS resource that overlaps with the first SRS resource and thesecond SRS resource.
 3. The method of claim 1, wherein the first SRSresource, the second SRS resource, and the third SRS resource overlap ina time duration, wherein the time duration comprises at least one of: asymbol; a slot; a transmission time interval; a subframe; or a frame. 4.The method of claim 1, wherein the selecting the spatial transmissionfilter is further based on at least one of: a first cell index of thefirst cell being less than a second cell index of the second cell; orthe first cell index of the first cell being greater than the secondcell index of the second cell.
 5. The method of claim 1, wherein theselecting the spatial transmission filter is further based on a firstSRS resource set index of a first SRS resource set comprising the firstSRS resource and a second SRS resource set index of a second SRSresource set comprising the second SRS resource.
 6. The method of claim1, wherein the selecting the spatial transmission filter is furtherbased on at least one of a first SRS resource type of the first SRSresource or a second SRS resource type of the second SRS resource havinga higher priority than a third SRS resource type of the third SRSresource.
 7. The method of claim 1, wherein: the first SRS resource isassociated with a first antenna panel, wherein the first antenna panelis indicated by a first antenna panel index; the second SRS resource isassociated with a second antenna panel, wherein the second antenna panelis indicated by a second antenna panel index; and the transmitting theSRS for the third SRS resource via the selected spatial transmissionfilter is based on the first antenna panel index and the second antennapanel index.
 8. A method comprising: receiving, by a wireless device,one or more configuration parameters of a first cell and a second cell;selecting, by the wireless device, one of a first spatial transmissionfilter of a first sounding reference signal (SRS) transmission for afirst SRS resource of the first cell or a second spatial transmissionfilter of a second SRS transmission for a second SRS resource of thefirst cell, wherein the selecting is based on: the first SRStransmission for the first SRS resource of the first cell and the secondSRS transmission for the second SRS resource of the first celloverlapping with a third SRS transmission for a third SRS resource ofthe second cell; and the first spatial transmission filter of the firstSRS transmission and the second spatial transmission filter of thesecond SRS transmission being different from a third spatialtransmission filter of the third SRS transmission; and transmitting, bythe wireless device via the selected one of the first spatialtransmission filter or the second spatial transmission filter, the thirdSRS transmission.
 9. The method of claim 8, wherein the one or moreconfiguration parameters comprise at least one of: a first index of thefirst cell and a second index of the second cell; or a first SRS spatialrelation associated with the first SRS transmission, a second SRSspatial relation associated with the second SRS transmission, and athird SRS spatial relation associated with a third SRS transmission. 10.The method of claim 8, wherein the transmitting the third SRStransmission is based on at least one of the first SRS transmission andthe second SRS transmission having a higher priority than the third SRStransmission.
 11. The method of claim 8, wherein the transmitting thethird SRS transmission is based on a first SRS resource set indexassociated with the first SRS resource and a second SRS resource setindex associated with the second SRS resource.
 12. The method of claim8, wherein: the first SRS transmission is associated with a firstantenna panel, wherein the first antenna panel is indicated by a firstantenna panel index; the second SRS transmission is associated with asecond antenna panel, wherein the second antenna panel is indicated by asecond antenna panel index; and the transmitting the third SRStransmission is based on the first antenna panel index and the secondantenna panel index.
 13. The method of claim 8, further comprisingdropping a fourth SRS transmission of the second cell, based on:determining, by the wireless device, that a fifth SRS transmission ofthe first cell and a sixth SRS transmission of the first cell overlapwith the fourth SRS transmission of the second cell; and determining, bythe wireless device, that a fifth spatial transmission filter of thefifth SRS transmission and a sixth spatial transmission filter of thesixth SRS transmission are different from a fourth spatial transmissionfilter of the fourth SRS transmission.
 14. The method of claim 8,wherein the first spatial transmission filter and the second spatialtransmission filter are different.
 15. A method comprising:transmitting, by a wireless device via a first spatial transmissionfilter of a first sounding reference signal (SRS) resource of a firstcell, a first SRS; transmitting, by the wireless device via a secondspatial transmission filter of a second SRS resource of the first cell,a second SRS; and transmitting a third SRS, wherein the transmitting isby the wireless device, via one of the first spatial transmission filteror the second spatial transmission filter, and based on: the first SRSresource and the second SRS resource overlapping with a third SRSresource of a second cell, and the first spatial transmission filter andthe second spatial transmission filter being different from a thirdspatial transmission filter of the third SRS resource of the secondcell.
 16. The method of claim 15, wherein the transmitting the third SRSis further based on at least one of the first SRS and the second SRShaving a higher priority than the third SRS.
 17. The method of claim 15,wherein the transmitting the third SRS is further based on a first SRSresource set index of a first SRS resource set comprising the first SRSresource and a second SRS resource set index of a second SRS resourceset comprising the second SRS resource.
 18. The method of claim 15,wherein: the first SRS resource is associated with a first antennapanel, wherein the first antenna panel is indicated by a first antennapanel index; the second SRS resource is associated with a second antennapanel, wherein the second antenna panel is indicated by a second antennapanel index; and the transmitting the third SRS is based on the firstantenna panel index and the second antenna panel index.
 19. The methodof claim 15, further comprising dropping a transmission of a fourth SRSfor a fourth SRS resource of the second cell, based on: determining, bythe wireless device, that a fifth SRS resource of the first cell and asixth SRS resource of the first cell overlap with the fourth SRSresource of the second cell; and determining, by the wireless device,that a fifth spatial transmission filter of the fifth SRS resource and asixth spatial transmission filter of the sixth SRS resource aredifferent from a fourth spatial transmission filter of the fourth SRSresource.
 20. The method of claim 15, wherein the first spatialtransmission filter and the second spatial transmission filter aredifferent.